[Mesa-dev] [Bug 72890] New: wayland/weston EGL/GLESv2 client corruption+flicker on mesa-10.x r600

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=72890

          Priority: medium
            Bug ID: 72890
          Assignee: wayland-bugs at lists.freedesktop.org
           Summary: wayland/weston EGL/GLESv2 client corruption+flicker on
                    mesa-10.x r600
        QA Contact: mesa-dev at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: emiettin at edu.lahti.fi
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: git
         Component: EGL/Wayland
           Product: Mesa

On my Radeon HD 5770, upgrading from mesa-9.2.5 to either mesa-10.0.1 or
mesa-git master introduces (in both versions) a corruption/flickering bug
concerning wayland/weston EGL/GLESv2 clients. See
http://www.youtube.com/watch?v=RQXE4h-E8PI for a relevant screen capture. 

It looks to me as if the glClear(GL_COLOR_BUFFER_BIT) call wasn't actually
coming into effect; instead, previous (or random) color data lingers in the
part of the frame buffer that isn't updated during rendering. The bug doesn't
really manifest itself in a weston client that updates each and every pixel
within each frame during rendering.

setup: Arch Linux x86_64 (Linux 3.12.5),
       mesa-git (+ ati-dri-git & mesa-libgl-git). Bug also in 10.0.1 stable.
       wayland/weston 1.3.0/1.3.1 as well as git

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