[Bug 111668] screen goes black and loses sync after about 10-15 minutes

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111668

--- Comment #18 from Robert Dinse <nanook at eskimo.com> ---
Created attachment 145385
  --> https://bugs.freedesktop.org/attachment.cgi?id=145385&action=edit
This is with debug enabled from boot until when the screen blanks dmesg

cat /proc/cmdline showed that what I put in GRUB_CMDLINE_LINUX_DEFAULT= in
etc/default/grub was being totally ignored, even after update-grub.  Instead I
had to put the argument in /etc/default/grub.d/50-system-image.cnf
GRUB_CMDLINE_LINUX_DEFAULT, there after update-grub and a reboot the argument
showed in /proc/cmdline, also cat /sys/module/drm/parameters/debug returns 14
now.

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