https://bugs.freedesktop.org/show_bug.cgi?id=99275
--- Comment #15 from Michel Dänzer michel@daenzer.net --- There are two basic explanations for not getting consistent bisection results:
* In each case, at least one bad commit was accidentally marked as good. Test longer / more times before declaring a commit as good to avoid this.
* The problem (or at least the trigger) isn't in the kernel but somewhere else.