https://bugs.freedesktop.org/show_bug.cgi?id=110117
--- Comment #2 from Craig stein12c@gmail.com --- Steps I took: 1. added drm.debug=4 to /etc/default/grub 2. sudo update-grub 3. reboot 4. reproduced the issue 5. rebooted using ctrl-sysrq-reisub 6. dumped this dmesg into log.txt