Comment 4 for bug 1752938

I'm facing huge difficulties after this upgrade. All games I'm running with wine stopped working. I did not test others. They start, but I either get a black or purple window, no image. Can somebody point me the right way to debug and solve this?

I have an AMD Radeon HD 7850 installed.

Making a basic test, it seems to perform better with software rendering... ?!?

$ glxgears -info
GL_RENDERER = AMD PITCAIRN (DRM 2.50.0 / 4.15.0-11-generic, LLVM 5.0.1)
GL_VERSION = 3.0 Mesa 18.0.0-rc4
GL_VENDOR = X.Org
(...)
VisualID 1064, 0x428
355 frames in 5.0 seconds = 70.940 FPS
300 frames in 5.0 seconds = 59.997 FPS

$ LIBGL_ALWAYS_SOFTWARE=1 glxgears -info
GL_RENDERER = llvmpipe (LLVM 5.0, 128 bits)
GL_VERSION = 3.0 Mesa 18.0.0-rc4
GL_VENDOR = VMware, Inc.
(...)
VisualID 1064, 0x428
6604 frames in 5.0 seconds = 1320.753 FPS
6758 frames in 5.0 seconds = 1351.475 FPS

Further details:
$ lspci -nn | grep -E 'VGA|Display'
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Pitcairn PRO [Radeon HD 7850 / R7 265 / R9 270 1024SP] [1002:6819]