https://bugs.freedesktop.org/show_bug.cgi?id=93144
--- Comment #2 from Stepan Bakshaev step2back+freedesktop@gmail.com --- I forget to attach important information.
OpenGL renderer string: Gallium 0.4 on AMD CAPE VERDE (DRM 2.43.0, LLVM 3.8.0) OpenGL core profile version string: 4.1 (Core Profile) Mesa 11.2.0-devel (padoka PPA)
mesa git151127001200.27a88a9 https://launchpad.net/~paulo-miguel-dias/+archive/ubuntu/mesa/+sourcepub/572... llvm svn254183 https://launchpad.net/~paulo-miguel-dias/+archive/ubuntu/mesa/+sourcepub/573...
packages from https://launchpad.net/~paulo-miguel-dias/+archive/ubuntu/mesa/
Linux silver 4.2.0-10-generic #12-Ubuntu SMP Tue Sep 15 19:43:01 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde XT [Radeon HD 7770/8760 / R7 250X]