[Bug 93555] Errors on lid close/open, black screen.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93555

--- Comment #21 from Bruno Pagani <bruno.n.pagani at gmail.com> ---
(In reply to Jani Nikula from comment #20)
> (In reply to Bruno Pagani from comment #19)
> > Like I’ve said in https://bugs.freedesktop.org/show_bug.cgi?id=93555#c13,
> > waking up on lid open is fixed.
> > 
> > What remains is:
> > 
> > – a black screen;
> > – an additional stale image from login manager when PSR is enabled.
> > 
> > So you would say this is DE dependent? Interesting, I’ll have to look a bit
> > more into that.
> 
> The kernel driver does not enable the displays on its own upon resume. The
> userspace has to ask for it.

I see. I suppose userspace is responsible for turning the display off on lid
close too? What about the stale image in PSR case? Is this a PSR bug? Device
specific?

> > Regarding backlight, I’ve filed
> > https://bugzilla.kernel.org/show_bug.cgi?id=194675.
> 
> Is it an ACPI backlight you have? What does 'ls /sys/class/backlight' say?

Not ACPI, intel_backlight.

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