[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 #152 from Stas KG <sinequanon at posteo.net> ---
(In reply to Stanislav Lisovskiy from comment #151)
> Hi,
> 
> Sorry for a long reply. I'm currently on vacation. Yes it works on Windows,
> I checked with codebase to which I have access and DSI/VBT code looks pretty
> much same. However I'm still not able to compare with their GPIO and ACPI
> code. It looks like we are lacking initialization of something or may be
> GPIO mapping is not completely correct. However I checked with our pinctrl
> developer person and from his point of view everything looks correct.
> I have found that there are other controlable pins which affect DSI display,
> not mentioned in VBT or manual, which makes me believe there is something
> else we need to make it work. Unfortunately without exact pin description
> and initialization sequences any hardware is a "blackbox". That is why I
> asked for more detailed init description from panel vendor. I guess they
> should have it anyway for panel testing purposes. I will be back on 17th and
> start working on it immediately.

Hi, just so you know, I also have a D330-10IGM (N5000 1200x1920 version), so if
you need any testing, I will follow this bug thread.

Just to confirm that the latest Windows driver (26.20.100.6890) works "out of
the box" (previous versions complained that they are not certified for this
device). For proper screen rotation and touchscreen operation you still need
separate drivers (Bosch rotation sensor and Goodix touchpanel).

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