https://bugs.freedesktop.org/show_bug.cgi?id=79980
--- Comment #71 from Alex Deucher agd5f@yahoo.com --- This bug was originally about a stability regression due to some GPUVM changes in 3.15. If 3.14 is stable for you but newer kernels are not, then it may be related. Otherwise, it's probably another issue. See bug 81644 about stability issues with Chromium specifically.