[Bug 36513] New: Screen sometimes garbled on Radeon HD 6310 after coming back from dpms off (?)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=36513

           Summary: Screen sometimes garbled on Radeon HD 6310 after
                    coming back from dpms off (?)
           Product: xorg
           Version: 7.6
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: gottfried.haider at gmail.com
         QAContact: xorg-team at lists.x.org


I am running xubuntu 11.04 beta on a Thinkpad X120e machine, which has a AMD
E-350 APU ("Radeon HD 6310" graphics).

The machine is running the default xserver-xorg (1:7.6+4ubuntu3) and
xserver-xorg-video-radeon (1:6.14.0-0ubuntu4), apart from that I am using a
vanilla 2.6.39-rc3 kernel.

I am sometimes seeing weird graphics artifacts after bringing the display back
from sleep, that look like analog TV and only go away after a reboot of the
machine. I have recorded a video of my desktop in such a state:
http://www.youtube.com/watch?v=X9POL1XyZos

There is no related entries in dmesg when this occurs. I am also not completely
sure about the mechanism that makes my screen go off (whether it's DPMS or
something else) - but I suspect that it's due to the "Put display to sleep when
computer is inactive" and "Switch of display when the computer is inactive"
settings in Xfce Power Manager.

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