[Mesa-dev] [Bug 62202] New: Mesa demo dest window of wincopy flickers while toggle f/b buffer on software render

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=62202

          Priority: medium
            Bug ID: 62202
          Assignee: mesa-dev at lists.freedesktop.org
           Summary: Mesa demo dest window of wincopy flickers while toggle
                    f/b buffer on software render
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: kobe.qin at intel.com
          Hardware: All
            Status: NEW
           Version: 9.1
         Component: Mesa core
           Product: Mesa

System Environment:       
--------------------------
Libdrm:         (master)libdrm-2.4.42
Mesa:           (9.1)mesa-9.1
Xserver:                (server-1.13-branch)xorg-server-1.13.2.902
Xf86_video_intel:               (master)2.21.3
Cairo:          (master)1.12.14
Libva:          (master)libva-1.1.0
Libva_intel_driver:            
(master)00f65b78e6de520a4820702207ce098c6b073724

Bug detailed description:
-----------------------------
Destination window of wincopy flickers while press "f" to toggle f/b color
buffer
If run on hardware,type "./wincopy", f/b color buffer rendered normally

Reproduce steps:
----------------------------
1. xinit&
2. gnome-session&
3. LIBGL_ALWAYS_SOFTWARE=1 ./wincopy

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