https://bugzilla.kernel.org/show_bug.cgi?id=75241
--- Comment #9 from Christian König deathsimple@vodafone.de --- (In reply to Alex Deucher from comment #8)
Does this patch help: http://lists.freedesktop.org/archives/dri-devel/2014-May/059469.html
Unlikely. Tasev has an RS780, on those the feedback divider is usually in the ~1000 area. This patch only moves the feedback divider limit for .5 from 14 down to 13.
Does it help if you suspend/resume again after this issue? Might be that we are seeing a crash somewhere else?