[Bug 35935] New: since 2.6.38.1, screen become garbled after some times (RV770)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=35935

           Summary: since 2.6.38.1, screen become garbled after some times
                    (RV770)
           Product: DRI
           Version: XOrg CVS
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Radeon
        AssignedTo: dri-devel at lists.freedesktop.org
        ReportedBy: mjulien.m at gmail.com


Created an attachment (id=45194)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=45194)
garbled screen

Hi, 

Since I'm using kernel 2.6.38.1, Xorg screen became garbled after some times
(see screenshot). It occurs on 2.6.38.2 but seems to be less frequent (3-4
hours for 2.6.38.1 ; 8-10 for 2.6.38.2)
I didn't get this bug with 2.6.38

TTY stay fine and after I close and start X, everything is fine again. No need
to reboot.

I can't find anything precise which can trigger this bug, it simply occurs.
Maybe an hint, it seems to be when I try to display a minimized window.

There is nothing obvious in the logs (but I'm not using debug option), kernel
or X.

kernel 2.6.38.2  (kernel-linus-2.6.38.2-1mdv-1-1 ; vanilla kernel packaged by
my distro)
xorg 1.9.3
ati 6.14.1
mesa 7.9
libdrm 2.4.24

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