Created attachment 113583 [details]
Syslog output during lockup

Hello,

There are several similar bug reports but someone asked to fill every instance
as separate bug so here goes.

I'm running Ubuntu 14.04 on a 64bit machine with kernel 3.13.0-46-generic
#75-Ubuntu SMP.

My GPU is: VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
RV635/M86 [Mobility Radeon HD 3650]

Packages:
xserver-xorg (1:7.7+1ubuntu8.1) 
xorg-server (2:1.15.1-0ubuntu2.6) 
xserver-xorg-video-ati (1:7.3.0-1ubuntu3.1) 

Randomly, sometimes 2-3 times a day, sometimes once every 2 days i get GPU
lockups. For 2-3 seconds the screen freezes, then goes black for a couple of
seconds, and then its still "frozen" and flickering when i move the mouse.

I am able to switch to console with ctrl+alt+f{n} but when coming back to
desktop, the screen is in the same frozen state.

I am NOT using proprietary drivers from AMD.

I attached an output from syslog when it happens, there seems to be no output
in Xorg.log though.

If you need any more information, please let me know.

Thanks!