[Bug 86267] [drm:evergreen_resume] *ERROR* evergreen startup failed on resume

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=86267

--- Comment #7 from stefanscheffler at gmx.net ---
Same here with a Radeon HD 5670 512MB GDDR5 using Arch Linux. It also happens
without starting X.

This error only shows up when the card successfully resumes not when it fails:

  [drm:rv770_stop_dpm] *ERROR* Could not force DPM to low.

Disabling DPM seems to prevent the startup failures.

Another observation. According to /proc/interrupts the card generates thousands
of interrupts per seconds after a failed resume, which might explain why the
system feels extremely sluggish afterwards.


Bisecting brought me to this commit. It's from early in the 3.17 cycle. I 
thought this was happening with 3.16 already, but maybe I remember wrong.

commit a3eb06dbca08e3fdad7039021ae03b46b215f22a
Author: Michel Dänzer <michel.daenzer at amd.com>
Date:   Wed Jul 9 20:15:42 2014 +0200

    drm/radeon: Remove radeon_gart_restore()

    Doesn't seem necessary, the GART table memory should be persistent.

    Signed-off-by: Michel Dänzer <michel.daenzer at amd.com>
    Reviewed-by: Christian König <christian.koenig at amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher at amd.com>

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