[Bug 50850] New: Horizontal scrolling causes graphics artifacts

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=50850

             Bug #: 50850
           Summary: Horizontal scrolling causes graphics artifacts
    Classification: Unclassified
           Product: xorg
           Version: git
          Platform: Other
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: mblaesing at doppel-helix.eu
         QAContact: xorg-team at lists.x.org


Created attachment 62741
  --> https://bugs.freedesktop.org/attachment.cgi?id=62741
Screenshot of the problem

Using netbeans I stumbled over the problem, that for example the exception
reporter shows distorted images, when scrolling to the right. Scrolling left
redraw the image correctly. I build a minimal example programm, that exhibits
the problem (will be attached in source and compiled as TestApp.tgz and
TestApp.jar). 

Scrolling a few time right and left lead to the attached wrong.png.

I'll attach xorg.conf and Xorg.0.log as attachments with wrong_ prefix.

I tested with disabled acceleration (Option "NoAccel" "true") and there now
text distortion is visible (see the ok_ prefixed attachements for mor info).

This is ubuntu 12.04 running with the xorg-edgers repository.

The xserver-xorg-video-radeon package version is:
6.14.99+git20120605.4603285a-0ubuntu0sarvatt~precise

Kernel version:
Linux prometheus 3.2.0-24-generic #39-Ubuntu SMP Mon May 21 16:52:17 UTC 2012
x86_64 x86_64 x86_64 GNU/Linux

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