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Explain some Xorg.0.log error/warning messages.

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Added explainations for:

(WW) Open ACPI failed (/var/run/acpid.socket)
(WW) VGA arbiter: cannot open kernel arbiter, no multi-card support
(EE) AIGLX error: dlopen of /opt/xorg/lib/dri/i965_dri.so failed
(EE) AIGLX error: unable to load driver i965
This commit is contained in:
Bruce Dubbs 2022-06-01 19:40:58 -05:00
parent c156674e8d
commit 147b566723
1 changed files with 76 additions and 0 deletions
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76
x/installing/xorg-config.xml
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@ -217,6 +217,82 @@ OpenGL version string: 3.0 Mesa 10.4.5</computeroutput></screen>
</sect2>
<sect2 role="configuration" id="xorg-debug" xreflabel="Debugging Xorg">
<title>Debugging Xorg</title>
<para>
When starting xorg, there are a couple of ways to check what any
issues you may have. If the system comes up, you can see what driver
is being used by running <command>xdriinfo</command>. If there are
issues or you just want to check, look at <filename>Xorg.0.log</filename>.
</para>
<para>
The location of <filename>Xorg.0.log</filename> depends on how Xorg is
installed. If the instructions in the book are followed closely and
Xorg is started from the comand line, it wil be located in the
<filename class="directory">$HOME/.local/share/xorg/</filename> directory.
If Xorg is started by a display manager (e.g. <xref linkend='lightdm'/>,
<xref linkend='lxdm'/>, or <xref linkend='gdm'/>) or if
<filename>$$XORG/PREFIX/libexec/Xorg</filename> has the suid bit set,
it will be located in the <filename class="directory">/var/log/</filename>
directory.
</para>
<bridgehead renderas="sect3">Xorg.0.log Issues</bridgehead>
<para>
When you look at Xorg.0.log, check for entries like (EE) or (WW).
Below are some common entries:
</para>
<bridgehead renderas="sect5">(WW) Open ACPI failed (/var/run/acpid.socket)</bridgehead>
<para>
This warning is becasue <xref linkend='acpid'/> is not installed. If you
are not on a laptop, it can be safely ignored. On a laptop, install
<xref linkend='acpid'/> to enable actions like recognizing when the lid is
closed.
</para>
<bridgehead renderas="sect5">(WW) VGA arbiter: cannot open kernel arbiter, no multi-card support</bridgehead>
<para>
This warning is displayed when a regular user starts Xorg. The library
<filename>libpciaccess.so</filename> issues this warning when it
tries to open <filename>/dev/vga_arbiter</filename>. If there is only
one video card in the system, it can safely be ignored. If desired, the
permissions of this device can be changed by adding a udev rule and
adding the local user to the video group. As the &root; user:
</para>
<screen role="root"><userinput>cat > /etc/udev/rules.d/99-vga-arbiter.rules &lt;&lt; EOF
# /etc/udev/rules.d/99-vga-arbiter.rules: Set vga_arbiter group/mode
ACTION=="add", KERNEL=="vga_arbiter", GROUP="video" MODE="0660"
EOF
usermmod -G video &lt;user running xorg&gt;</userinput></screen>
<bridgehead renderas="sect5">(EE) AIGLX error: dlopen of /opt/xorg/lib/dri/i965_dri.so failed</bridgehead>
<para>
This error, accompanied by (EE) AIGLX error: unable to load driver i965, occurs
in some systems with Intel based graphics devices. It is caused by a mismatch
between the current <xref linkend='xorg-server'/> and <xref linkend='mesa'/>. Xorg
no longer uses the i965 driver and uses the crocus or isis mesa drivers as
indicated by the <command>xdpiinfo</command> command. It can safely be ignored.
</para>
<para>
If desired, this warning can be removed by commenting out lines
330-331 and 337-338 (LogMessage) of
<filename>glx/glxdricommon.c</filename> in the <xref linkend='xorg-server'/>
package.
</para>
</sect2>
<sect2 role="configuration" id="hybrid-graphics" xreflabel="Hybrid Graphics">
<title>Hybrid Graphics</title>