Comment 31 for bug 1315369

To be explicit. We would like to obtain a system log with graphics debugging enabled, after reproducing the problem. We believe the following steps should achieve that:

1) reboot, interrupt grub, and add "drm.debug=6" to the kernel command line. There is a good guide on how to do this at the URL below, see the section "Temporarily Add a Kernel Boot Parameter for Testing":

   https://wiki.ubuntu.com/Kernel/KernelBootParameters

2) reproduce the issue

3) hit ctrl-alt-F1 to get the text login, and then hit the power button which should trigger a clean reboot.

4) boot normally, login and attach the files /var/log/dmesg, /var/log/dmesg.0 and /var/log/syslog.

Hope that makes sense.