On Fri, Aug 8, 2014 at 12:37 PM, Linus Torvalds <torvalds at linux-foundation.org> wrote: > > The problem seems to exist already with just the plain drm pull from > Dave. I thought I had tested that, but apparently not.
Still busy bisecting (and it's going into the i915 part of Dave's drm pull, so the bisect looks sane so far), but in case some i915 person is trying to think about what it might be, it doesn't seem to be the backlight per se. Sometimes it resumes with the backlight on and something showing on the screen, but no reaction to mouse or keyboard. And in fact, I have now gotten an X lockup twice *without* doing resume/suspend, so it seems like the whole resume/suspend thing is just a way to trigger it, not the fundamental problem. The machine is alive (the printscreen button takes a screenshot, for example - I can tell by the sound), but the graphics side is hung. This is a Sony Vaio Pro 11, so it's bog-standard intel graphics (Haswell ULT). Linus