[Wayland-bugs] [Bug 46451] New: screenshot doesn't work on weston in drm backend

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=46451

             Bug #: 46451
           Summary: screenshot doesn't work on weston in drm backend
    Classification: Unclassified
           Product: Wayland
           Version: unspecified
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: weston
        AssignedTo: wayland-bugs at lists.freedesktop.org
        ReportedBy: jian.j.zhao at intel.com


System Environment:
--------------------------
wayland: (master) ab3b5cd71ce6dd1a532d9c1fecabb1a6e9d1a055
libdrm: (master) 23eeb7e1e45417a5a84f826286dd982dba440cd3
macros: (master) 52ef6f666a4fb46b693c81dc7a44612e6b78239d
glproto: (master) 29d5b553b30755a25300c30b67d39b37c9a76466
dri2proto: (master) 7fd18b15646a62bd82a4eb0eca60a34c1731813d
xproto: (master) ab1fba1a0967ac2289909c3f1a643f876a5dd393
libX11: (master) 2ca641c3a506dcbee97e279b67990d5387389f36
mesa: (master) 3dd7b53178cb085a1ff3d87844fa51487f8892fc
kbproto: (master) b0f7912512091ea58dfaf8dffb2a658a6afeb96d
libxkbcommon: (master) 1ab058bbb345245088f54315227fe0cf52ae54ed
pixman: (master) 4fc586c3df9a53cc1406891e751a6eed3d7da400
cairo: (master) da8841cc5ea0b45daba6b91227a2b7058a0120b7
weston: (master) 31f9d0e8de4f788aaf35fb8072dc290da19b097a

Bug detailed description:
-------------------------
When run the wayland client demo 'screenshot' in drm backend, it can't get
anything on screen but only a black screen in the picture it takes. This is
tested on SandyBridge platform. It works well in x11 backend. 

Reproduce steps:
-------------------------
1. start x
2. start weston
3. start demo screenshot
4. check the picture it takes

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