Comment # 2 on bug 93144 from Stepan Bakshaev

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/5729700/+listing-archive-extra 
llvm svn254183
https://launchpad.net/~paulo-miguel-dias/+archive/ubuntu/mesa/+sourcepub/5730044/+listing-archive-extra

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]