Created attachment 112660 [details]
2015012222dmesg.txt test after upgrading vlc.
I upgraded vlc to 2.2.0~rc2-2 and re-tested against the same video running
under the current Linus' git head kernel.
There was a gpu lock-up again - each different test seems to have the lock-up
happen at a different stage in play-back, as if there is a non-deterministic
event leading to the lock-up.