[Bug 88921] System reboots upon suspending when Radeon 5770 card is used

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=88921

--- Comment #4 from Eduard Bloch <blade@debian.org> ---
Created attachment 162051
  --> https://bugzilla.kernel.org/attachment.cgi?id=162051&action=edit
dmesg covering X server lockup

This becomes more and more weird. Sometimes I can boot the system and I can
suspend it five times per day with no issues. Sometimes it reboots as described
in the original description.

And sometimes it seems to hang for about 10 seconds before the fans are turned
off (this feels like with pre-3.13rcX kernels). When I resume it, the X picture
is frozen. But I still can switch to the FB console and kill X from there.
However, when X is restarted, it feels slightly sluggish, like having no
accelleration in some applications. I haven't tested movie playback or other
things in that mode yet, and Firefox freezes at 100% CPU time when I visit some
sites like *sic* kernel bugzilla.

All that obvservations with the same kernel 3.18.1. I added the dmesg look
again, it contains something about r600 exception which looked related.

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