On 08.09.2014 20:32, repron wrote:
Last several freezes of Xorg, coused that Xorg.o.log file ended suddenly, without SIGSEGV. I am still trying to reproduce exactly the same state of "freeze" as mentioned in the bug. Of course it can be a bug in kernel or somewhere else but if I had uninstalled packages xserver-xorg-video-radeon, xserver-xorg-video-iti and installed in that place packages: fglrx-modules-dkms and firmware-linux-nonfree the error of "freezing" did not appeared.
(Note that the firmware-linux-nonfree package is required for the radeon driver, not for fglrx, but the information you've provided shows that it was installed)
It seems like the crashes you're experiencing are more or less random and all over the place. I can think of two basic explanations for that: Either the GPU is scribbling over random system memory locations, or there is a problem with the RAM or some other hardware component in the system.
You can test for the latter with the memtest86(+) or memtester package. -- Earthling Michel Dänzer | http://www.amd.com Libre software enthusiast | Mesa and X developer