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

[bugzilla-daemon at freedesktop.org]

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

--- Comment #30 from Jani Nikula <jani.nikula at intel.com> ---
(In reply to Pavel Nakonechnyi from comment #29)
> (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?

The patch is not even upstream. The two commits apparently helped the original
reporter, so it seems to me you have a different root cause.

Please file a new bug, add dmesg with drm.debug=14, attach
/sys/kernel/debug/dri/0/i915_vbt.

Are you doing UEFI boot? If not, please try.

-- 
You are receiving this mail because:
You are the assignee for the bug.
You are the QA Contact for the bug.
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20180409/0aaed485/attachment.html>