Bug#841712: systemd: Display black on resume from suspend

[Michael Biebl]

Control: severity -1 + moreinfo

Am 22.10.2016 um 16:35 schrieb Bill Gribble:
> 
> I am entering hibernate by pressing the power button, which I have
> mapped to
> the "hibernate" action in Gnome.  I believe this uses the systemd hibernate
> action.
> 
> No combination of switching VTs, keyboard/mouse input, or anything else
> can get
> the display on when it is in this state.
> 
> I know the system has resumed, because if I close the laptop lid to
> suspend-to-
> ram and then open again the display lights up properly and I'm back where I
> should be.
> 
> I have hibernated the system using other means with differing results:
> 
>  * "echo disk > /sys/power/state" hibernates and resumes successfully with
> active display after resume

This is what "systemctl hibernate" uses.

Can you run this command and see if that works?

>  * "pm-hibernate" with no quirks behaves exactly like the power-button
> action
> (display black on resume)
> 
>  * "pm-hibernate --quirk-dpms-on" hibernates and resumes properly

Having "pm-utils" installed is no longer recommended fwiw. I would
uninstall it. Do you have other packages like
"laptop-mode-tools" or "hibernate" installed, which might interfere?
If so, can you purge them and try again?
Do you have any custom hooks in
/lib/systemd/system-sleep/ ?
If so, can you attach them to this bug report please.

What's the output of systemctl show hibernate.target
-- 
Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?

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