197 lines
8.2 KiB
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197 lines
8.2 KiB
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<TITLE>The Answer Guy 32:
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Tuning X to work with your Monitor
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<!-- ORIGINAL SUBJECT:
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Monitor config problem
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ALINK="#FF0000">
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<H4>"Linux Gazette...<I>making Linux just a little more fun!</I>"
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<P> <hr> <P>
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<H1 align="center"><A NAME="answer">
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<img src="../gx/dennis/qbubble.gif" alt="" border="0" align="middle">
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<a href="./index.html">The Answer Guy</a>
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<img src="../gx/dennis/bbubble.gif" alt="" border="0" align="middle">
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</A></H1>
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<BR>
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<H4 align="center">By James T. Dennis,
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<a href="mailto:linux-questions-only@ssc.com">linux-questions-only@ssc.com</a>
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<BR>Starshine Technical Services, <A HREF="http://www.starshine.org/">http://www.starshine.org/</A>
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</H4>
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<p><hr><p>
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<H3><img src="../gx/dennis/qbub.gif" alt="(?)"
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width="50" height="28" align="left" border="0"
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>Tuning X to work with your Monitor</H3>
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<p><strong>From Alan Morton on the L.U.S.T Mailing List
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on 14 Aug 1998 </strong></p>
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<!-- begin body -->
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<p><strong>I am wondering if anyone on the list has any experience with a vid
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card/monitor combination similar to mine, or have any experience
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with this particular problem that can either give me some
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constructive advice or can point me to some relevent documentation.
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</strong></p>
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<p><strong>I am using a Jaton 67-P video card with 4 megs of RAM. I am trying
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to use it with a HP 4033A monitor. The problem is that whem I use
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Xconfigurator (I'm using a RH5.0 distro) irregardless of what it
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says about an acceptable configuration, when I start up X it trips
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the Power Saving function on the monitor and it goes blank.
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</strong></p>
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<p><strong>When I use the cntrl-alt-backspace it naturally kills X, plus it
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retrips the monitor and my screen begins to reappear. I am making
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the assumption that it is engaging some error procedure in the
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monitor, which is fine. But I really want to get this working at a
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reasonable resolution. If I use a setting of 800x600 and 8 bit
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color it works just fine, but that seems a bit wasted on a 21"
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monitor.
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</strong></p>
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<p><strong>I know the monitor will handle a lot because I can use it at
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1024x748 in 16 bit color with my Windows NT boot-up. And I have a
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friend with an identical monitor running 1280x1024 in 24 bit color
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under Win95.
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</strong></p>
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<p><strong>I don't think the problem is the card because I have been running
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it with a 14" Magitronic monitor previously at 800x600 in 24 bit
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under both NT and Linux with no problems.
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</strong></p>
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<p><strong>Any assistance with this will be greatly appreciated.
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<br>Alan Morton
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</strong></p>
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<blockquote><img src="../gx/dennis/bbub.gif" height="28" width="50"
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alt="(!)" border="0"
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>The problem you are having is related to the refresh rate that X is
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trying to use for the mode you are trying to display. The rate may
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be either too high or too low. I am not sure exactly about the
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specifics of what needs to be done to change the refresh rate that X
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uses, but I'm sure there is a good source of information for
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configuring the display properties of X. Hopefully this will narrow
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your scope in searching for an answer, because I don't really know
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what else would cause this problem. Any other suggestion welcome.
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</blockquote>
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<blockquote>Configuring X on a system is like a classic "three-body problem."
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</blockquote>
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<blockquote>You have to get the correct software and libraries all
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installed (which any distribution makes pretty easy).
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</blockquote>
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<blockquote>You have to select the correct "server" for your video card.
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This is complicated by the number of video card manufacturers
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--- many of whom have many models of video card, often
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identified by a stream of very similar sound digits and
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letters while using completely different combinations
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of chipsets, clock chips, and RAMDAC's (digital to analog
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coverters?).
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</blockquote>
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<blockquote>You have to provide a "tuned" set of video timings. This
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is primarily dependent on your monitor.
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</blockquote>
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<blockquote>Getting all of these things to work together is still a
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pain. However, the xf86config, SuperProbe, and Xconfigurator
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have helped alot. I've heard that Eric S. Raymond's
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Video-Timings-HOWTO has helped alot of people (though I've never
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used it myself). I've played with '<tt>vidtune</tt>' (an X program that
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allows you to tune your video times after you've gotten
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"close enough") --- but it's still a bit mysterious to me.
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(How to I get it to write the timings out to a format I can
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use in my XF86Config?)
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</blockquote>
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<blockquote>I usually just use a "hit and miss" approach by looking
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through the list of samples in <tt>/usr/X11R6/lib/X11/doc/Monitors</tt>
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(or thereabouts). The one on my
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<A HREF="http://www.suse.com/">S.u.S.E.</A> box lists about
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65 different samples for various monitors. I just play with
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them a bit while I hand hack on the <tt>/etc/X11/XF86Config</tt> file
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(which is probably the least efficient way of doing it ---
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but usually <tt>Xconfigurator</tt> and a good multisync monitor
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get along O.K. so I usually don't have to fuss too much).
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</blockquote>
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<!-- end body -->
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<P> <hr> <P>
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<H5 align="center"><a href="http://www.linuxgazette.com/copying.html"
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>Copyright ©</a> 1998, James T. Dennis <BR>
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Published in <I>Linux Gazette</I> Issue 32 September 1998</H5>
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