[Bug 43841] New: radeon rendering corruption

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=43841

             Bug #: 43841
           Summary: radeon rendering corruption
    Classification: Unclassified
           Product: xorg
           Version: 7.6 (2010.12)
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: hramrach at gmail.com
         QAContact: xorg-team at lists.x.org


Created attachment 54441
  --> https://bugs.freedesktop.org/attachment.cgi?id=54441
corrupted text. Note that some shows the wrong text completely

I experience wholesale corruption on 00:01.0 VGA compatible controller [0300]:
ATI Technologies Inc Device [1002:9806]

Linux (Ubuntu) 3.2.0-4-generic

xserver-xorg-core                 2:1.11.2.902+git20111209+server-1
xserver-xorg-video-radeon         1:6.14.99+git20111212.aacbd629-[   12.711129] 

[drm] initializing kernel modesetting (PALM 0x1002:0x9806 0x1043:0x84E7).
[   12.711246] [drm] register mmio base: 0xFEB00000
[   12.711249] [drm] register mmio size: 262144
[   12.711412] ATOM BIOS: Ontario


The attached screenshot shows typical issue - wholesale corruption in GMail.
Amusingly, taking a screenshot does not make the thing go away, it just changes
which text is corrupted.

On Redwood I get occasionally minor corruption in Firefox.

On r300 x1600-ish I get similar effects since I disabled vline waits,
occasionally.

Not sure this is related (either to the vline waits or the r600 issue). The
corruption on r300 happens sometimes in Evince or gkrellm (or maybe Firefox),
not in terminals. I did not try re-enabling the vline waits or downgrading X
because it's hard to tell if the issue is present or not.

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