[Bug 104139] [CFL] Screen goes blank right after boot.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104139

--- Comment #29 from Pavel Nakonechnyi <zorg1331 at gmail.com> ---
(In reply to Jani Nikula from comment #28)
> (In reply to Timo Aaltonen from comment #27)
> > right, I replied to the patch thread asking if it should be sent for stable,
> > but got no reply
> 
> Yeah, sorry about that. The relevant commits are in v4.16:
> 
> 6e3322c226f1 ("drm/i915/cnp: Properly handle VBT ddc pin out of bounds.")
> f24c606c21a8 ("drm/i915/cnp: Ignore VBT request for know invalid DDC pin.")
> 
> I've made a stable backport request for v4.15.

Thank you.

However, in my personal case (Dell 5590 laptop with "Intel Corporation UHD
Graphics 620 (rev 07)" card), the mentioned patches not enough to solve the
problem.

I experience the same error as in the original bug report. The only solution
that works for me for v4.16 and v4.14 kernels is to apply the patch from
https://patchwork.kernel.org/patch/10003565/ "drm/i915: check pin validity of
VBT configurationlogin".

>From my point of view "6e3322c226f1" and "f24c606c21a8" contain slightly less
quirks comparing to the patch that helped me.

Could someone with good knowledge of this subsystem decide if it should also be
included into the mainline/stable?

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