General bug reports
If you are experiencing a problem with Xorg, the following would be useful to attach to your bug report (individually, uncompressed, with MIME type set as text/plain):
/etc/X11/xorg.conf
(or, if this file does not exist, specify in the bug report that it does not)- X server log file(s)
/var/log/Xorg.*.log
/var/log/Xorg.0.log
from a trial run where you move/etc/X11/xorg.conf
aside and let Xorg autodetect your hardware (if you have such a file).
KMS problems (most Intel and AMD/Radeon hardware)
Please add drm.debug=1 to the kernel command line, reboot and attach /var/log/messages
to your bug report.
Additionally, please add nomodeset to the kernel command line and try to reproduce the problem, and include the following information :
- if you were able to reproduce the problem or not
- X server log file(s)
/var/log/Xorg.*.log
to your bug report as well.
You can follow the instructions listed on the Xorg/KMS page to edit the kernel command line.
Creating a xorg.conf
If you need to make manual changes to X configuration, you will need to create a xorg.conf file.
Stack traces
See the documentation on the upstream wiki.