diff --git a/x/installing/xorg-config.xml b/x/installing/xorg-config.xml
index c9ef06f600..37d25cdb0a 100644
--- a/x/installing/xorg-config.xml
+++ b/x/installing/xorg-config.xml
@@ -217,6 +217,82 @@ OpenGL version string: 3.0 Mesa 10.4.5
+
+ Debugging Xorg
+
+
+ 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 xdriinfo. If there are
+ issues or you just want to check, look at Xorg.0.log.
+
+
+
+ The location of Xorg.0.log 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
+ $HOME/.local/share/xorg/ directory.
+ If Xorg is started by a display manager (e.g. ,
+ , or ) or if
+ $$XORG/PREFIX/libexec/Xorg has the suid bit set,
+ it will be located in the /var/log/
+ directory.
+
+
+ Xorg.0.log Issues
+
+
+ When you look at Xorg.0.log, check for entries like (EE) or (WW).
+ Below are some common entries:
+
+
+ (WW) Open ACPI failed (/var/run/acpid.socket)
+
+
+ This warning is becasue is not installed. If you
+ are not on a laptop, it can be safely ignored. On a laptop, install
+ to enable actions like recognizing when the lid is
+ closed.
+
+
+ (WW) VGA arbiter: cannot open kernel arbiter, no multi-card support
+
+
+ This warning is displayed when a regular user starts Xorg. The library
+ libpciaccess.so issues this warning when it
+ tries to open /dev/vga_arbiter. 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:
+
+
+cat > /etc/udev/rules.d/99-vga-arbiter.rules << 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 <user running xorg>
+
+ (EE) AIGLX error: dlopen of /opt/xorg/lib/dri/i965_dri.so failed
+
+
+ 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 and . Xorg
+ no longer uses the i965 driver and uses the crocus or isis mesa drivers as
+ indicated by the xdpiinfo command. It can safely be ignored.
+
+
+
+ If desired, this warning can be removed by commenting out lines
+ 330-331 and 337-338 (LogMessage) of
+ glx/glxdricommon.c in the
+ package.
+
+
+
+
Hybrid Graphics