I've tried using different kernel versions the past few days and I've failed to
trigger the crash with any kernel prior to 3.15-rc3. Today after a few hours of
used, my system just locked up again and my screens went black, forcing me to
reboot the machine, same thing I've experienced with 3.16 and 3.17 so I believe
this is where the bug originated.
However, it seems like when I booted up, nothing has been written to kern.log
nor does any errors show up in xorg.log, and dmesg shows me nothing.
I got the image from:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.15-rc3-utopic/ which also
shows what changes were made to this release.
The issue might have originated here, but it could very well be that I've
missed something.