320 lines
5.3 KiB
HTML
320 lines
5.3 KiB
HTML
<HTML
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><HEAD
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><TITLE
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>Debugging</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.52"><LINK
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REL="HOME"
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TITLE="Linux PPP HOWTO"
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HREF="index.html"><LINK
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REL="PREVIOUS"
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TITLE="Linuxconf - Universal (almost) Linux PPP dialer"
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HREF="x342.html"><LINK
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REL="NEXT"
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TITLE="My modem connects but ppp never starts up"
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HREF="x412.html"></HEAD
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><BODY
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CLASS="CHAPTER"
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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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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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><A
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HREF="http://www.linuxports.com/howto/ppp"
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TARGET="_top"
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>Linux PPP HOWTO</A
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></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="x342.html"
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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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></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="x412.html"
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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="CHAPTER"
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><H1
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><A
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NAME="PROBLEMS"
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>Chapter 8. Debugging</A
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></H1
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><DIV
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CLASS="TOC"
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><DL
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><DT
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><B
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>Table of Contents</B
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></DT
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><DT
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>8.1. <A
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HREF="problems.html#AEN386"
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>I have compiled PPP support into the kernel, but...</A
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></DT
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><DD
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><DL
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><DT
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>8.1.1. <A
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HREF="problems.html#AEN389"
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>Are you booting the right kernel?</A
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></DT
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><DT
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>8.1.2. <A
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HREF="problems.html#AEN399"
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>Did you compile ppp kernel support as a module?</A
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></DT
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><DT
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>8.1.3. <A
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HREF="problems.html#AEN405"
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>Are you using the correct version of PPP for your kernel?</A
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></DT
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><DT
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>8.1.4. <A
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HREF="problems.html#AEN409"
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>Are you running pppd as root?</A
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></DT
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></DL
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></DD
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><DT
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>8.2. <A
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HREF="x412.html"
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>My modem connects but ppp never starts up</A
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></DT
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><DT
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>8.3. <A
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HREF="x419.html"
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>The syslog says "serial line is not 8 bit clean"</A
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></DT
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><DD
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><DL
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><DT
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>8.3.1. <A
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HREF="x419.html#AEN427"
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>You are not correctly logging into the server</A
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></DT
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><DT
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>8.3.2. <A
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HREF="x419.html#AEN432"
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>You are not starting PPP on the server</A
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></DT
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><DT
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>8.3.3. <A
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HREF="x419.html#AEN437"
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>The remote PPP process is slow to start</A
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></DT
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></DL
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></DD
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><DT
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>8.4. <A
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HREF="x452.html"
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>Default route not set</A
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></DT
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><DT
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>8.5. <A
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HREF="x459.html"
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>Other Problems</A
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></DT
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></DL
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></DIV
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><P
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>There are any number of reasons that your connection does not work -
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chat has failed to complete correctly, you have a dirty line, etc. So
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check your syslog for indications.</P
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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="AEN386"
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>8.1. I have compiled PPP support into the kernel, but...</A
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></H1
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><P
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>A very common problem is that people compile PPP support into the kernel
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and yet when they try to run pppd, the kernel complains that it does not
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support ppp! There are a variety of reasons this can occur.</P
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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="AEN389"
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>8.1.1. Are you booting the right kernel?</A
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></H2
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><P
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>Whilst you <I
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CLASS="EMPHASIS"
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>have</I
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> recompiled your kernel to support ppp, you
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are not booting the new kernel. This can happen if you do not update
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<TT
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CLASS="LITERAL"
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>/etc/lilo.conf</TT
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> and rerun lilo.</P
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><P
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>A good check on the kernel can be obtained by issuing the command
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<TT
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CLASS="LITERAL"
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>uname -a</TT
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>, which should produce a line like:-</P
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><P
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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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><PRE
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CLASS="PROGRAMLISTING"
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>Linux archenland 2.0.28 #2 Thu Feb 13 12:31:37 EST 1997 i586</PRE
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></TD
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></TR
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></TABLE
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> </P
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><P
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>This gives the kernel version and the date on which this kernel was
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compiled - which should give you a pretty good idea of what is going on.</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="AEN399"
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>8.1.2. Did you compile ppp kernel support as a module?</A
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></H2
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><P
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>If you compiled your kernel ppp support as a module, but did not make
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and install the modules, then you can get this error. Check the
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kernel-HOWTO and the README file in <TT
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CLASS="LITERAL"
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>/usr/src/linux</TT
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>!</P
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><P
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>Another module connected possibility is that you are expecting required
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modules to be automatically loaded, but are not running the <TT
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CLASS="LITERAL"
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>kerneld</TT
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>
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daemon (which auto-loads and unloads modules on the fly). Check the
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kerneld mini-HOWTO for information on setting up kerneld.</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="AEN405"
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>8.1.3. Are you using the correct version of PPP for your kernel?</A
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></H2
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><P
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>You <I
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CLASS="EMPHASIS"
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>must</I
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> use ppp-2.2 with kernel version 2.0.x. You can use ppp-2.2
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with kernel version 1.2.x (if you patch the kernel), otherwise you must
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use ppp-2.1.2.</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="AEN409"
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>8.1.4. Are you running pppd as root?</A
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></H2
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><P
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>If you are not running pppd as the root user (and pppd is not suid to
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root), you can receive this message.</P
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></DIV
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></DIV
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></DIV
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><DIV
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CLASS="NAVFOOTER"
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><HR
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ALIGN="LEFT"
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WIDTH="100%"><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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><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="x342.html"
|
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>Prev</A
|
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></TD
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><TD
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WIDTH="34%"
|
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ALIGN="center"
|
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VALIGN="top"
|
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><A
|
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HREF="index.html"
|
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>Home</A
|
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></TD
|
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><TD
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WIDTH="33%"
|
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ALIGN="right"
|
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VALIGN="top"
|
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><A
|
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HREF="x412.html"
|
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>Next</A
|
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></TD
|
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></TR
|
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><TR
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><TD
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WIDTH="33%"
|
|
ALIGN="left"
|
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VALIGN="top"
|
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>Linuxconf - Universal (almost) Linux PPP dialer</TD
|
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><TD
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WIDTH="34%"
|
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ALIGN="center"
|
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VALIGN="top"
|
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> </TD
|
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><TD
|
|
WIDTH="33%"
|
|
ALIGN="right"
|
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VALIGN="top"
|
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>My modem connects but ppp never starts up</TD
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></TR
|
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></TABLE
|
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></DIV
|
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></BODY
|
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></HTML
|
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> |