[Bug 80773] [hsw backlight bisected] backlight is off after resume

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80773

--- Comment #22 from Jani Nikula <jani.nikula at intel.com> ---
(In reply to Harald Judt from comment #21)
> > There are a mixture of issues reported in this bug, but it seems the most
> > pressing is the backlight after resume regression. I'm making this bug be
> > about that alone, and changing subject to reflect that. If there are other
> > issues, please report new bugs about them.
> 
> Jani Nikula, the issue was not about backlight resume. The original report
> was about hibernate/resume, but that is solved.
> 
> In fact, the backlight issue does not have anything to do with resume, but
> only with dpms off/on.

Argh. This is why we generally prefer new bug reports for new issues. I
understand it's all clear to you, but when looking at loads and loads of bugs,
it's easy to be confused when you quickly read through the bugs. Still, my bad.

> To reproduce my problem, you only need to
> xset dpms force off && sleep 10 && xset dpms force on

Please provide dmesg with drm.debug=14, running the patch, and reproduce this.
Thanks.

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