https://bugs.freedesktop.org/show_bug.cgi?id=33309
--- Comment #30 from stefan fdo.12.bendus@xoxy.net 2012-07-09 11:18:52 PDT --- Hi Daniel, (In reply to comment #29)
(In reply to comment #28)
are there any news on this issue? The 3.4 and 3.5-rc series seem stable wrt this issue, but unfortunately something broke resume from s2ram badly, the backlight stays off and the machine does not respond even to SysRq and I need to do a hard power-off.
That's good&bad news. Can you try to bisect the backlight regression that has been introduce in 3.4 and open a new bug report? That usually helps in fixing it ...
It turns out to be an ACPICA regression not related to graphics at all.
As for this issue, I did not observe any more hangs with v3.4 or 3.5-rc, *yet*. It is hard to tell for sure since it usually takes a while (sometimes hours) for it to occure. Which makes it also almost impossible to bisect and to find the commit that might have fixed it.
Cheers, Stefan.