[Bug 34427] New: Graphical corruption when opening windows

[bugzilla-daemon@freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=34427

           Summary: Graphical corruption when opening windows
           Product: DRI
           Version: XOrg CVS
          Platform: x86-64 (AMD64)
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: General
        AssignedTo: dri-devel@lists.freedesktop.org
        ReportedBy: h.judt@gmx.at


Created an attachment (id=43507)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=43507)
screenshot of the garbled frame

Although it is visible only for a very short moment, I was able to capture it,
see the screenshot attached to this bug. It seems something doesn't get
initialized correctly like it used to before, part of the garbled area looks
like it's previous screen content, just pretty messed.

* I think this only happens when using compositing, but did not test it, so I'm
not sure.
* Is noticable with xfwm4 (the xfce window manager) and compiz.
* Is only noticable sometimes (maybe because the other times it's just too
fast, but I'll try to capture it with recordmydesktop).
* It can be seen on various window types, like the small firefox / thunderbird
frame which appears before the normal window appears, or menus.
* It is not constrained to window size.
* This did not happen some time ago, but I don't know when it started. Before
it started, the windows were simply grey.

Software and versions:
* git vanilla kernel (2.6.38-rc5), certainly happened with 2.6.37
* git mesa (r600g)
* git xf86-video-ati
* git libdrm

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