[Bug 59321] S4 broken with Haswell

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=59321





--- Comment #8 from Paulo Zanoni <przanoni at gmail.com>  2013-06-06 21:38:14 ---
Ok, so I have been playing with this for some time today. The machine I've used
has only an eDP monitor.

I enabled a bunch of debug options in the Kernel, including kmemleak. I could
reproduce the bug a few times, and so far I notice that the S4 problem only
happens *after* I see kmemleak complains about some weird stuff that happens
when we're trying to turn the eDP panel power on. I have seen this 3 times:

- Boot the machine
- Check for kmemleak on dmesg
- S4 suspend
- Boot again and check for kememleak on dmesg
- So far, I have only seen crashes after dmesg complains about kmemleak

Another thing I have to point is that the crash happens when I'm already back
to X, many seconds after the real reboot.

Do you also observe that?

Thanks,
Paulo

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