[Bug 65761] HD 7970M Hybrid - hangs and errors and rmmod causes crash

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=65761

--- Comment #57 from Christoph Haag <haagch.christoph at googlemail.com> ---
Long time, no update from me.

Using 3.19-rc2:

rmmod radeon works fine
modprobe radeon after rmmod stalls once:

[   53.031311] radeon 0000:01:00.0: ring 5 stalled for more than 10000msec
[   53.032230] radeon 0000:01:00.0: GPU lockup (current fence id
0x0000000000000000 last fence id 0x0000000000000002 on ring 5)
[   53.032322] [drm:uvd_v1_0_ib_test [radeon]] *ERROR* radeon: fence wait
failed (-35).
[   53.033262] [drm:radeon_ib_ring_tests [radeon]] *ERROR* radeon: failed
testing IB on ring 5 (-35).
[   53.037997] [drm] Radeon Display Connectors
[   53.041287] radeon 0000:01:00.0: No connectors reported connected with modes
[   53.041289] [drm] Cannot find any crtc or sizes - going 1024x768
[   53.041834] [drm] fb mappable at 0xE0479000
[   53.041835] [drm] vram apper at 0xE0000000
[   53.041835] [drm] size 3145728
[   53.041836] [drm] fb depth is 24
[   53.041837] [drm]    pitch is 4096
[   53.041941] radeon 0000:01:00.0: fb1: radeondrmfb frame buffer device
[   53.042347] [drm] Initialized radeon 2.40.0 20080528 for 0000:01:00.0 on
minor 1

but it recovers and then works.

So rmmod radeon and modprobe radeon do not cause any critical errors anymore,
it only is a bit annoying that modprobe radeon takes 10 seconds.

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