[Wayland-bugs] [Bug 89131] [Bisected] Graphical corruption in Weston, shows old framebuffer pieces

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89131

            Bug ID: 89131
           Summary: [Bisected] Graphical corruption in Weston,  shows old
                    framebuffer pieces
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: EGL/Wayland
          Assignee: wayland-bugs at lists.freedesktop.org
          Reporter: lothmordor at gmail.com
        QA Contact: mesa-dev at lists.freedesktop.org

Created attachment 113450
  --> https://bugs.freedesktop.org/attachment.cgi?id=113450&action=edit
weston-corruption.png

Weston shows graphical corruption when run as regular user. Looks like old
framebuffer data is getting reused (i.e. partial text and images from firefox
or the desktop). Tested inside X and on console with weston-launch.  Running as
root shows no corruption.  Bisected to mesa commit below:

Mesa 10.6.0-devel (git-3f1e128)
linux-3.19.0-rc7
wayland (git-52d971c)
westonn (git-ad1218f)

commit 0467a52dc3f7d51eeb51179ce2f9871758ecacb1
Author: Park, Jeongmin <pjm0616 at gmail.com>
Date:   Sat Feb 7 17:53:48 2015 +0900

    st/dri: Make depth buffer optional for postprocessing

    Since only pp_jimenezmlaa uses depth buffer, we can make it optional.

    Signed-off-by: Marek Olšák <marek.olsak at amd.com>

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