Comment # 4 on bug 70388 from Rostislav Krasny

Created attachment 87518 [details]
second failure

Adding 'export MESA_EXTENSION_OVERRIDE=-GL_ARB_framebuffer_object' into
~/.bashrc didn't help. KDE became stuck a few seconds after login again. After
I switched to console terminal the "failed to idle channel 0xcccc0000" failure
happened again. See the aatached log file, taken from 'journalctl -a' output.
Mentioned in the log dump will be attached in the next message.