[Bug 86565] black screen after resume from hibernation since linux kernel 3.18

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=86565

--- Comment #15 from Martin Steigerwald <Martin at Lichtvoll.de> ---
Okay, with

https://bugzilla.kernel.org/show_bug.cgi?id=94241#c3

on top of

https://bugzilla.kernel.org/show_bug.cgi?id=94241#c1

the machine hibernates again.

I still get the symptom described in this bug on resume. The screen is black
for a minute or more and then suddenly is blanked on.

And I know something else now: I am able to log into the machine from a second
ThinkPad at that time.

Yet, I do not see *anything* regarding the initial wait in kern.log. I am still
back at 3.19-rc7 due to the issue I described in

https://bugzilla.kernel.org/show_bug.cgi?id=94241#c4

as the backtrace described there has

Mar  5 08:57:41 merkaba kernel: [  858.107406]  [<ffffffff812b4315>]
do_unblank_screen+0xd3/0x141

in it, there may be some relation although that issue happens on opening a
second Plasma/KDE session as I described in the comment in the other bug. So
either this is a third bug, or this is somehow related to the other or this
bug.

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