[Bug 108826] [GLK DSI] Black screen after grub - Ubuntu 18.04 - kernel latest tip 21.11.2018

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108826

--- Comment #169 from Stanislav Lisovskiy <stanislav.lisovskiy at intel.com> ---
(In reply to Mark Wynn Garcia from comment #167)
> So I tested it and the screen and backlight now works! However I still
> encounter some issues:
> - Suspend/Resume still doesn't seem to power up the screen properly. Only
> the backlight turns on.

That might mean you either have somewhat different hardware or kernel source
tree... Or we might need to search for some other typo ;)

> 
> But overall the fix makes everything so much better. I guess there's still a
> couple of cases we haven't checked, but I'm happy to start with this fix.

(In reply to Miroslaw from comment #168)
> I made tests
> 
> - screen works during boot kernel and later Ubuntu !
> - Suspend/Resume .. WORKS ! finally
> 
> .. make some more tests tomorrow but seems works finally proper !
> Great job after 6 months ;-D

Great to hear that :) I have ended up comparing each and every register write
with default values set by BIOS.

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