[Bug 81546] New: Radeon 7990: Output of most applications garbled, Gnome shell mosly fine

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81546

          Priority: medium
            Bug ID: 81546
          Assignee: dri-devel at lists.freedesktop.org
           Summary: Radeon 7990: Output of most applications garbled,
                    Gnome shell mosly fine
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: mail at marcelschaal.de
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: Drivers/Gallium/radeonsi
           Product: Mesa

Created attachment 103116
  --> https://bugs.freedesktop.org/attachment.cgi?id=103116&action=edit
Screenshot of Gnome shell

Please have a look at the screenshots. Rendering of most windows is totally
garbled including window decoration. This is not about Crossfire/SLI/Multi GPU
rendering, just plain single GPU.

Gnome-shell's own rendering is mostly fine. Panel, lock screen animations,
menus and dashboard don't show distortions. 
KDE's/Kwin is worse, even the panel's are broken, but it's able to draw window
decorations.
glxgears's rendering is fine.
Linux console (no X11) is also fine.


Hardware:
PowerColor AX7990 6GBD5-2DHJ, which is one of those fake 7990s that actually
use 2x7970 Tahiti XT on a single PCB and not 2x Malta. Other GPUs (6950/7950)
were working fine with that system.

Software:
Fedora 19/20 (From stock LiveCD image to current updates incl. Kernel 3.15.4)
There were no (drawing!) issues when I was using catalyst.

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