Comment # 27 on bug 1119621 from sep hoogzaad

(In reply to Tejas Guruswamy from comment #26)

Thanks for the suggestion.

We already concluded that your issue is different from mine. I did try the
intel_idle.max_cstate=4 kernel parameter, but, as expected, with no success.

I accidentally found that updating/replacing the BIOS, did solve my problem
also,  apart from the "git revert 49218c83e25b6f0708f246b07d570b2c43a98223"
solution.

details are in: https://bugs.freedesktop.org/show_bug.cgi?id=109398

Since i do not have any problems anymore and, as we later found out, having an
other problem anyway, i will leave.

It was funny. The comments in this post set me thinking that the problem i/we
had, could be caused by a recent kernel change. This appeared to be true. But
even all the symptoms were the same, the cause was something else. Bugs appear
to walk in strange ways. 

Good luck with yours!