777 lines
15 KiB
HTML
777 lines
15 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<HTML
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><HEAD
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><TITLE
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>Graphics Chip</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK
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REL="HOME"
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TITLE="Linux on the Road"
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HREF="index.html"><LINK
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REL="UP"
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TITLE="Hardware in Detail: CPU, Display, Keyboard, Sound and More"
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HREF="mobile-guide-p2c1-hardware-in-detail.html"><LINK
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REL="PREVIOUS"
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TITLE="PCMCIA Controller"
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HREF="mobile-guide-p2c1s2-pcmcia-controller.html"><LINK
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REL="NEXT"
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TITLE="DVI Port"
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HREF="mobile-guide-p2c1s24-dvi-port.html"></HEAD
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><BODY
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CLASS="sect1"
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BGCOLOR="#FFFFFF"
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TEXT="#000000"
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LINK="#0000FF"
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VLINK="#840084"
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ALINK="#0000FF"
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><DIV
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CLASS="NAVHEADER"
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><TABLE
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SUMMARY="Header navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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>Linux on the Road: </TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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VALIGN="bottom"
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><A
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HREF="mobile-guide-p2c1s2-pcmcia-controller.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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>Chapter 12. Hardware in Detail: CPU, Display, Keyboard, Sound and More</TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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><A
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HREF="mobile-guide-p2c1s24-dvi-port.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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></TABLE
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><HR
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><DIV
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CLASS="sect1"
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><H1
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CLASS="sect1"
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><A
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NAME="mobile-guide-p2c1s4-graphic-chip"
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></A
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>12.6. Graphics Chip</H1
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><DIV
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CLASS="sect2"
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><H2
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CLASS="sect2"
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><A
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NAME="AEN1963"
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></A
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>12.6.1. Linux Compatibility Check</H2
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><DIV
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CLASS="sect3"
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><H3
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CLASS="sect3"
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><A
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NAME="AEN1965"
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></A
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>12.6.1.1. Video Mode</H3
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><P
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>
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Attention: The <B
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CLASS="command"
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>SuperProbe</B
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> is deprecated.
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The tool <B
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CLASS="command"
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>SuperProbe</B
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> is part of XFree86 and is able to
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check many graphics chips. Please read the documentation carefully,
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because it might crash your hardware.
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From <B
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CLASS="command"
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>man SuperProbe</B
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>:
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</P
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><P
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> "<B
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CLASS="command"
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>SuperProbe</B
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> is a program that will attempt to determine the type of
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video hardware installed in an EISA/ISA/VLB-bus system by checking for
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known registers in various combinations at various locations
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(MicroChannel and PCI machines may not be fully supported; many work
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with the use of the <B
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CLASS="command"
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>-no_bios</B
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> option). This is an
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error-prone process, especially on <SPAN
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CLASS="acronym"
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>UNIX</SPAN
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> (which
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usually has a lot more esoteric hardware installed than MS-DOS system
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do), so <B
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CLASS="command"
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>SuperProbe</B
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> may likely need help from the user.
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</P
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><P
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> At this time, <B
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CLASS="command"
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>SuperProbe</B
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> can identify MDA, Hercules, CGA, MCGA, EGA,
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VGA, and an entire horde of SVGA chipsets (see the -info option, below).
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It can also identify several HiColor/True-color RAMDACs in use on SVGA
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boards, and the amount of video memory installed (for many chipsets). It
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can identify 8514/A and some derivatives, but not XGA, or PGC (although
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the author intends to add those capabilities). Nor can it identify other
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esoteric video hardware (like Targa, TIGA, or Microfield boards).":
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</P
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><P
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> For testing reasons start the X11 server with <B
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CLASS="command"
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>X 2>
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<error.msg></B
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>. And try to change the resolution by typing
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<B
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CLASS="command"
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><CTL><ALT><+></B
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> or
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<B
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CLASS="command"
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><CTL><ALT><-></B
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>. Note: the + or -
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sign have to be taken from the numeric pad, which can be emulated at
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the letter pad or with the <B
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CLASS="command"
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>Fn</B
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> key by some laptops.
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</P
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></DIV
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><DIV
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CLASS="sect3"
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><H3
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CLASS="sect3"
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><A
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NAME="AEN1983"
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></A
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>12.6.1.2. Text Mode</H3
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><P
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> Just watch the display and determine if it works properly.
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If not, try to enable different video modes at startup time.
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Setting up X11 can sometimes be an exercise in trial and error.
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</P
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></DIV
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></DIV
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><DIV
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CLASS="sect2"
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><H2
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CLASS="sect2"
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><A
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NAME="AEN1986"
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></A
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>12.6.2. Related Documentation</H2
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><P
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>
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<P
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></P
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><OL
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TYPE="1"
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><LI
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><P
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> First of all the
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<A
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HREF="http://www.xfree86.org/"
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TARGET="_top"
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>XFree86 documentation</A
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>
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itself. Often locally available at
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<TT
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CLASS="filename"
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>/usr/share/doc/xfree86*</TT
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>.
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Or the <A
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HREF="http://x.org/"
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TARGET="_top"
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>X.Org</A
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> documentation.
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</P
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></LI
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><LI
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><P
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> <A
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HREF="http://tldp.org/HOWTO/XFree86-HOWTO/"
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TARGET="_top"
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>XFree86-HOWTO</A
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>
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</P
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></LI
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><LI
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><P
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> <A
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HREF="http://tldp.org/HOWTO/XFree86-Video-Timings-HOWTO/"
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TARGET="_top"
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>XFree86-Video-Timings-HOWTO</A
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>
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</P
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></LI
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><LI
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><P
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> <A
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HREF="http://tldp.org/HOWTO/XFree86-XInside.html"
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TARGET="_top"
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>XFree86-XInside-HOWTO</A
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>
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</P
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></LI
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><LI
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><P
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> <A
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HREF="http://tldp.org/HOWTO/X-Big-Cursor.html"
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TARGET="_top"
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>X-Big-Cursor-mini-HOWTO</A
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>
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(useful when running X11 on a notebook with low contrast <SPAN
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CLASS="acronym"
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>LCD</SPAN
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>)
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</P
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></LI
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><LI
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><P
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> <A
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HREF="http://tldp.org/HOWTO/Keyboard-and-Console-HOWTO.html"
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TARGET="_top"
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>Keyboard-and-Console-HOWTO</A
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>
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</P
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></LI
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><LI
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><P
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> <A
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HREF="http://tldp.org/HOWTO/Framebuffer-HOWTO.html"
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TARGET="_top"
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>Framebuffer-HOWTO</A
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>
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</P
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></LI
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></OL
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>
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</P
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></DIV
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><DIV
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CLASS="sect2"
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><H2
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CLASS="sect2"
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><A
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NAME="AEN2014"
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></A
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>12.6.3. Survey X11-Servers</H2
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><P
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> You might discover that some features of your laptop are not supported by
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<A
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HREF="http://www.xfree86.org/"
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TARGET="_top"
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>XFree86</A
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>
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or <A
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HREF="http://x.org/"
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TARGET="_top"
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>X.Org</A
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>.
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, e.g. high resolutions, accelerated X or an external monitor.
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Therefore I give a survey of available X11 servers.
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</P
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><P
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>
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<P
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></P
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><OL
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TYPE="1"
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><LI
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><P
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> <A
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HREF="http://www.xfree86.org/"
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TARGET="_top"
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>XFree86</A
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>
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</P
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></LI
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><LI
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><P
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> <A
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HREF="http://x.org/"
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TARGET="_top"
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>X.Org</A
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>.
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</P
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></LI
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><LI
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><P
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> VESA Frame-Buffer-Device, available with 2.2.x kernels and XFree86 3.3.2 or greater.
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See
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<A
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HREF="http://linux-fbdev.org/"
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TARGET="_top"
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>FBDev.ORG</A
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> and
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<A
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HREF="http://www.strusel007.de/linux/fb.html"
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TARGET="_top"
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>FB FAQ</A
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>
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and kernel source <TT
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CLASS="filename"
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>/usr/src/linux/Documentation</TT
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>
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.
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</P
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><P
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> Please check the latest release of
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<A
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HREF="http://directfb.org/"
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TARGET="_top"
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>DirectFB</A
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>
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for a dedicated Framebuffer Driver for the NeoMagic
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chip and other chipsets, with support for acceleration.
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DirectFB is a thin library that provides developers with hardware graphics
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acceleration, input device handling and abstraction, an integrated
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windowing system with support for translucent windows and multiple display
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layers on top of the Linux framebuffer device. It is a complete hardware
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abstraction layer with software fallbacks for every graphics operation that
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is not supported by the underlying hardware.
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</P
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></LI
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><LI
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><P
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> <A
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HREF="http://www.xig.com/"
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TARGET="_top"
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>Xi Graphics</A
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>
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, commercial, also known under their former names
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AcceleratedX or Xinside.
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</P
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></LI
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><LI
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><P
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> <A
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HREF="http://www.scitechsoft.com/"
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TARGET="_top"
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>SciTech</A
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>, commercial.
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</P
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></LI
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><LI
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><P
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> <A
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HREF="http://www.metrolink.com/"
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TARGET="_top"
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>Metro-X</A
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>, commercial.
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</P
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></LI
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></OL
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>
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</P
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><P
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> If you can't get an appropriate X11 server working, but cannot
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afford a commercial X11 server you may try the VGA16 or the mono server
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included in XFree86.
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</P
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></DIV
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><DIV
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CLASS="sect2"
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><H2
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CLASS="sect2"
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><A
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NAME="AEN2044"
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></A
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>12.6.4. Resources</H2
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><P
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> You may find a survey about
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<A
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HREF="http://tuxmobil.org/graphic_linux.html"
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TARGET="_top"
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>current graphics chips
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used in laptops and notebooks</A
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> at TuxMobil.
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</P
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></DIV
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><DIV
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CLASS="sect2"
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><H2
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CLASS="sect2"
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><A
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NAME="AEN2048"
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></A
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>12.6.5. External Monitors: LCD, CRT, TV, Projector</H2
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><P
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> There are several different methods to activate support for an external
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monitor: as a <EM
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>BIOS option</EM
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> or during runtime with a
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<EM
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>keystroke</EM
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> e.g.
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<B
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CLASS="command"
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><Fn>+<F4></B
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>.
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</P
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><P
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> Read the X11 docs about your graphics chip carefully, for instance for
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the NeoMagic NM20xx chips you have to edit
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<TT
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CLASS="filename"
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>/etc/XF86Config</TT
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> by configuring
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<B
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CLASS="command"
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>intern_disp</B
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> and <B
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CLASS="command"
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>extern_disp</B
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>. Note:
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As far as I know these options are only valid for XFree86 3.3.x, for
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XFree86 4.x I couldn't find a similar option.
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</P
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><P
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> If you can't get the external monitor to work with XFree86, try a demo
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version of the commercial X11 servers mentioned above. Also check with
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the RedHat and SuSE WWW sites as they may have new, binary-only, X11
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servers that may work with your laptop.
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Or check X11 servers from <A
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HREF="http://x.org/"
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TARGET="_top"
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>X.Org</A
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>.
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</P
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><DIV
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CLASS="sect3"
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><H3
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CLASS="sect3"
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><A
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NAME="AEN2060"
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></A
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>12.6.5.1. Tools</H3
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><P
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> The
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<A
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HREF="http://www.stud.uni-hamburg.de/users/lennart/projects/atitvout/"
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TARGET="_top"
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>atitvout</A
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>
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utility may be used for executing several configuration commands
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for the TV Out connector of ATI Rage Mobility P/M graphics boards under
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GNU/Linux on x86. It is intended primarily to enable TV Out support after
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bootup and for switching the used TV standard from NTSC to PAL.
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</P
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><P
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> <A
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HREF="http://www.probo.com/timr/savage40.html"
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TARGET="_top"
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>s3switch</A
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>
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will allow you to switch your
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display between the various output devices supported by the Savage (CRT,
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LCD, TV).
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</P
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><P
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> <A
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HREF="http://sourceforge.net/projects/nv-tv-out"
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TARGET="_top"
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>nv-tv-out</A
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>
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is a tool to enable TV-Out on Linux for NVidia cards. It does not
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need the kernel, supports multiple TV encoder chips. You may use all the
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features of the chip, down to direct register access, and all resolutions
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and sizes the chip supports.
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</P
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><P
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> <A
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HREF="http://www16.plala.or.jp/mano-a-mano/i810switch.html"
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TARGET="_top"
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>i810switch</A
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>
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is an utility for switching the LCD and external VGA displays on and off,
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with almost every graphics chip from Intel's i8xx family, including
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Centrino.
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</P
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><P
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> <A
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HREF="http://sourceforge.net/projects/i855crt"
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TARGET="_top"
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>i855crt</A
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>
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is an userspace driver that can enable the CRT out (port for
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external monitor) on Intel 855GM based laptops.
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</P
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></DIV
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><DIV
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CLASS="sect3"
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><H3
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CLASS="sect3"
|
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><A
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NAME="AEN2072"
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></A
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>12.6.5.2. Solutions</H3
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><P
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> Klaus Weidner has described a
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<A
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HREF="http://mailman.linux-thinkpad.org/pipermail/linux-thinkpad/2003-November/013701.html"
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TARGET="_top"
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>Dual monitor setup</A
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>
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without using xinerama, but <B
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CLASS="command"
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>x2vnc</B
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> instead.
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This approach allows to add and
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remove the second monitor dynamically without reconfiguring or restarting anything.
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</P
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></DIV
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></DIV
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><DIV
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CLASS="sect2"
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><H2
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CLASS="sect2"
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><A
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NAME="AEN2077"
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></A
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>12.6.6. Power Management for Graphics Cards</H2
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><P
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> The uptime on batteries can be improved by enabling the power management
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features of the graphics card. There are tools available to change the clock
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frequency and to shut down the backlight of the display. Usually these tools
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are specific for a graphics card or a graphics card manufacturer.
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Here are some techniques for graphics cards made by ATI.
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</P
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><P
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> The proprietary <TT
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CLASS="filename"
|
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>fglrx</TT
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> driver from ATI needs to be
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enabled by adding the PowerState option to the Device Section in the
|
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<TT
|
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CLASS="filename"
|
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>/etc/X11/xorg.conf</TT
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> X11 configuration file:
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</P
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><P
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>
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<TABLE
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BORDER="0"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><TR
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><TD
|
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><FONT
|
|
COLOR="#000000"
|
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><PRE
|
|
CLASS="programlisting"
|
|
> Section "Device"
|
|
Identifier "aticonfig-Device[0]"
|
|
Driver "fglrx"
|
|
Option "PowerState" "1"
|
|
EndSection
|
|
</PRE
|
|
></FONT
|
|
></TD
|
|
></TR
|
|
></TABLE
|
|
>
|
|
|
|
</P
|
|
><P
|
|
> After rebooting or re-starting X11 you can start the power save mode with the
|
|
command <B
|
|
CLASS="command"
|
|
>aticonfig --set-powerstate=1 --effective=now</B
|
|
>.
|
|
Use <B
|
|
CLASS="command"
|
|
>aticonfig --list-powerstates</B
|
|
> to get all available
|
|
powerstates.
|
|
</P
|
|
><P
|
|
> For ATI Radeon graphics cards the <B
|
|
CLASS="command"
|
|
>rovclock</B
|
|
> tool can be used
|
|
to save power e.g. <B
|
|
CLASS="command"
|
|
>rovclock -c 80 -m 80</B
|
|
> to use only 80MHz chip
|
|
and memory frequency. The command <B
|
|
CLASS="command"
|
|
>radeontool light off</B
|
|
>
|
|
switches the backlight off, if closing the lid or using an extra key is not an
|
|
option.
|
|
</P
|
|
><P
|
|
> The
|
|
<A
|
|
HREF="http://lkml.org/lkml/2006/10/9/83"
|
|
TARGET="_top"
|
|
>ACPI backlight driver</A
|
|
>
|
|
by Holger Macht in 2.6.x for IBM, Toshiba, ASUS laptops
|
|
adds support for the generic backlight interface below
|
|
<TT
|
|
CLASS="filename"
|
|
>/sys/class/backlight</TT
|
|
>. The patch keeps the procfs brightness handling for
|
|
backward compatibility. For this to archive, the patch adds two generic
|
|
functions brightness_get and brightness_set to be used both by the procfs
|
|
related and the sysfs related methods.
|
|
</P
|
|
></DIV
|
|
><DIV
|
|
CLASS="sect2"
|
|
><H2
|
|
CLASS="sect2"
|
|
><A
|
|
NAME="AEN2095"
|
|
></A
|
|
>12.6.7. Miscellaneous</H2
|
|
><P
|
|
> Sometimes you may encounter a display not working properly in text mode.
|
|
Currently I don't have any recommendations, please see
|
|
<A
|
|
HREF="http://tldp.org/HOWTO/Keyboard-and-Console-HOWTO.html"
|
|
TARGET="_top"
|
|
>Keyboard-and-Console-HOWTO</A
|
|
>
|
|
.
|
|
</P
|
|
><P
|
|
> Take care of the <EM
|
|
>backlight</EM
|
|
> as far as I know this
|
|
device can only bear a limited number of uptime circles. So avoid using
|
|
screensavers too much.
|
|
</P
|
|
><P
|
|
> For problems with X Windows and <SPAN
|
|
CLASS="acronym"
|
|
>APM</SPAN
|
|
> please see the
|
|
<SPAN
|
|
CLASS="acronym"
|
|
>APM</SPAN
|
|
> chapter.
|
|
</P
|
|
><P
|
|
> <A
|
|
HREF="http://www.srcf.ucam.org/~mjg59/vbetool/"
|
|
TARGET="_top"
|
|
>vbetool</A
|
|
>
|
|
uses LRMI in order to run code from the video BIOS.
|
|
Currently, it is able to alter DPMS states, save/restore video card state,
|
|
and attempt to initialize the video card from scratch. It exists primarily
|
|
in order to increase the chances of successfully recovering video state
|
|
after an ACPI S3 suspend-to-RAM.
|
|
</P
|
|
></DIV
|
|
></DIV
|
|
><DIV
|
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CLASS="NAVFOOTER"
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><HR
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ALIGN="LEFT"
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SUMMARY="Footer navigation table"
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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><A
|
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HREF="mobile-guide-p2c1s2-pcmcia-controller.html"
|
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ACCESSKEY="P"
|
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>Prev</A
|
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><TD
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>Home</A
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><A
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><SPAN
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CLASS="acronym"
|
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>PCMCIA</SPAN
|
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> Controller</TD
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WIDTH="34%"
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