https://bugs.freedesktop.org/show_bug.cgi?id=74420 --- Comment #14 from Barto --- I have a similar problem, the screen freezes ( keyboard and mouse are frozen too ) for one minute, then X crashes with an automatic reboot of X, after the reboot all seems Ok but 2 minutes later the same problem occurs again, I use archlinux 64 bits, radeon driver ( I have an ati radeon HD4650 pcie ), mesa 10.0.3 and kernel 3.12.9, with dpm mode enabled, but this bug is very rare and difficult to reproduce, and I forgot to copy the Xorg log file ( because at each reboot the Xorg log is automaticaly erased ), but for what I saw with my configuration the bug seems to be related with vdpau driver which is part of mesa package, and also related with the linux kernel because vdpau relies on linux kernel, a possible pattern to trigger the bug with my configuration : - use KDE 4.12 with opengl 2.0 enabled ( kwin ) - enable DPM feature for radeon driver - use a software who uses vdpau features ( for example "kaffeine" who is a dvb-t software, mplayer ) - open multiple GUI programs like firefox, notepad, dolphin ( whatever you want ) soon or later ( it can take hours or even days ) something will go wrong, the first step is kaffeine who will show a black screen instead of a video image, then the second step is a total freeze of KDE 4 and keyboard/mouse, the freeze will last 30 seconds to 1 minute, then X will crash and automaticaly reboot, what I am sure : if I disable "vdpau" feature in the configuration of Kaffeine the bug will never occur, "vdpau" seems to be the key element in my configuration for this bug -- You are receiving this mail because: You are the assignee for the bug.