Package: libgl1-mesa-glx
Version: 9.2.2-1
Severity: important
Dear Maintainer,
after upgrading to XServer 1.15, compositing in KWin does not work anymore.
Downgrading X back to 1.14
confirmed that indeed the issue was introduced by the upgrade.
However, further research indicates that this is actually a bug in Mesa, which
has been reported
against Ubuntu at [1] and upstream at [2]. Upstream has patches [3][4].
It's not only kwin showing the bug, but also my small GL test application [5]:
glXChooseFBConfig returns
a GLXFBConfig that, when passed to glXGetVisualFromFBConfig, just yields NULL.
The patch [3]
indicates that the problem is incorrect default values for GLX_DRAWABLE_TYPE,
and indeed if I
explicitly request a GLX_DRAWABLE_TYPE of GLX_WINDOW_BIT in my test
application, the bug is gone.
$ sudo lspci -nn |grep -i vga
00:02.0 VGA compatible controller [0300]: Intel Corporation 2nd Generation Core
Processor Family Integrated Graphics Controller [8086:0126] (rev 09)
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GF108M [GeForce GT
630M] [10de:0de9] (rev ff)
Kind regards
Ralf
[1] https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1278168
[2] https://bugs.freedesktop.org/show_bug.cgi?id=70706
[3] http://patchwork.freedesktop.org/patch/20458/
[4] http://patchwork.freedesktop.org/patch/20464/
[5] http://www.ralfj.de/git/gltest.git
-- System Information:
Debian Release: jessie/sid
APT prefers testing
APT policy: (990, 'testing'), (100, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 3.12-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages libgl1-mesa-glx:amd64 depends on:
ii libc6 2.17-97
ii libdrm22.4.52-1
ii libglapi-mesa 9.2.2-1
ii libx11-6 2:1.6.2-1
ii libx11-xcb12:1.6.2-1
ii libxcb-dri2-0 1.10-2
ii libxcb-glx01.10-2
ii libxcb11.10-2
ii libxdamage11:1.1.4-1
ii libxext6 2:1.3.2-1
ii libxfixes3 1:5.0.1-1
ii libxxf86vm11:1.1.3-1
ii multiarch-support 2.17-97
Versions of packages libgl1-mesa-glx:amd64 recommends:
ii libgl1-mesa-dri 9.2.2-1
libgl1-mesa-glx:amd64 suggests no packages.
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