[Bug 71067] New: [drm:r600] UVD not responding OR failed testing IB on GFX ring

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=71067

          Priority: medium
            Bug ID: 71067
          Assignee: dri-devel at lists.freedesktop.org
           Summary: [drm:r600] UVD not responding OR failed testing IB on
                    GFX ring
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: timothee.romain.ravier at gmail.com
          Hardware: Other
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Radeon
           Product: DRI

When I boot 3.10 or 3.11 kernels, I get either one of those errors, apparently
at random :
  * UVD not responding, trying to reset the VCPU
    -> Full log attached: *freeze-boot-then-yellow.log
    The display turns yellow when the X server starts. I can still use VT and
there is no corruption there. I made sure that I got the latest firmware and I
also checked my initrd (following instructions in 65270);

  * GPU lockup CP stall for more than 10000msec
    GPU lockup (waiting for 0x000000000000020e last fence id
0x00000000000001ec)
    r600_ib_test] *ERROR* radeon: fence wait failed (-35)
    radeon_ib_ring_tests] *ERROR* radeon: failed testing IB on GFX ring (-35)
    -> Full log attached: *freeze-cursor.log
    I can log into my graphical session, but quickly after that, everything
freeze and I can only move the cursor which displays as a "corrupted" square.
    Again VT are fine.

I filed only one bug report as I get both issue using the same software and
boot command line.

At the beginning I had bug 67994, which turned into this one. I tried
downgrading the kernel without much success for now.

Booting with nomodeset works perfectly (with no accel/KMS obviously) and
booting under Windows 7 too.

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