[Bug 18400] New: Occasional tiny window decoration corruption [EXA enabled, Compiz]

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=18400

           Summary: Occasional tiny window decoration corruption [EXA
                    enabled, Compiz]
           Product: xorg
           Version: 7.4
          Platform: x86 (IA32)
               URL: https://bugs.edge.launchpad.net/ubuntu/+source/xserver-
                    xorg-video-ati/+bug/291055
        OS/Version: Linux (All)
            Status: NEW
          Severity: minor
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: bryce at canonical.com
         QAContact: xorg-team at lists.x.org


Created an attachment (id=20092)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=20092)
Xorg.0.log

Forwarding this EXA bug from a Ubuntu tester:
https://bugs.edge.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/291055

[Problem]
Infrequent window decoration corruption under Compiz with EXA.

[Original Report]
I observe occasional corruption of window decorations. It is quite rare,
though. It manifests itself as a tiny, horizontal, white line of garbage in the
upper right corner of the affected window (on the decoration/frame, across the
transparent shadow).

The window decorator is the standard gtk-window-decorator that comes with
Compiz on Ubuntu, with decorator setup at defaults and standard Human theme. I
have no screenshot of this at the moment, because I am not sure how to
reproduce it, but it does happen. I will attach a screenshot to this bug as
soon as I see the problem.

Xorg driver in use is xserver-xorg-video-radeon git20081003.f9826a56-0ubuntu2.
EXA-acceleration is enabled.
Ubuntu 8.10 (fully updated, installed from RC).
Compiz is enabled.
Human window decoration theme.
Graphics card: ATI X1400 mobile radeon (R500), 128MB RAM.

If more information is needed, please say so. I am also willing and able to
test new GIT-snapshots of the radeon driver, and provide feedback if problems
are fixed, etc.

[Screenshot showing corruption]
http://launchpadlibrarian.net/19122875/tiny-windeco-corruption-compiz-radeon.png

[lspci]
01:00.0 VGA compatible controller [0300]: ATI Technologies Inc Radeon Mobility
X1400 [1002:7145]
        Subsystem: Lenovo Device [17aa:202a]
(See http://launchpadlibrarian.net/19073523/lspci-vvnn.txt for full output)


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