[Bug 71887] New: Garbled output when rendering to a framebuffer object

[bugzilla-daemon@freedesktop.org]

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https://bugs.freedesktop.org/show_bug.cgi?id=71887

          Priority: medium
            Bug ID: 71887
          Assignee: dri-devel@lists.freedesktop.org
           Summary: Garbled output when rendering to a framebuffer object
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: vluchits@gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: 9.2
         Component: Drivers/Gallium/r600
           Product: Mesa

Created attachment 89601
  --> https://bugs.freedesktop.org/attachment.cgi?id=89601&action=edit
3.11 screenshot

Hardware: AMD HD 5770
Motherboard: MSI 790FX-GD70

Upon updating to 3.12 Linux kernel noticed that render-to-texture (FBO) in
Warsow has regressed.

In 3.12 the target texture seems to contain random but consistent region of
video card's texture memory: the blueish pattern on the screenshot definitely
looks like a normalmap.

We could not reproduce the bug on another machine with AMD HD 67xx.

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