Bug 1180710

Summary:	black screen when booting with external monitor connected
Product:	[openSUSE] openSUSE Tumbleweed	Reporter:	Arvin Schnell <aschnell>
Component:	X.Org	Assignee:	Gfx Bugs <gfx-bugs>
Status:	RESOLVED DUPLICATE	QA Contact:	Gfx Bugs <gfx-bugs>
Severity:	Normal
Priority:	P5 - None	CC:	aschnell, filippos, fkrueger
Version:	Current
Target Milestone:	---
Hardware:	Other
OS:	Other
Whiteboard:
Found By:	Development	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---
Attachments:	Xorg log with external monitor Xorg log without external monitor

Description Arvin Schnell 2021-01-08 16:54:18 UTC

When booting the system (ThinkPad X240) without an external monitor
everything seems to work fine. But when I boot the system with an
external monitor connected both monitors (internal and external)
stay black (when X starts - kernel messages upto then are shown on
both monitors). In that case I cannot even switch to the console
or even toggle NumLock.

The strange thing is that when I boot the system without the external
monitor connected and X is up, I can connect the monitor and both
monitors are working fine.

Also note that about three weeks ago the problem did not show up
at all. The software was updated in between.

Comment 1 Arvin Schnell 2021-01-08 16:55:45 UTC

Created attachment 844950 [details]
Xorg log with external monitor

Comment 2 Arvin Schnell 2021-01-08 16:56:22 UTC

Created attachment 844951 [details]
Xorg log without external monitor

Comment 3 Frank Krüger 2021-01-08 17:06:47 UTC

You might be hit by https://bugzilla.opensuse.org/show_bug.cgi?id=1180543. Try kernel 5.10.5 from OBS Kernel:stable (https://download.opensuse.org/repositories/Kernel:/stable/standard/), which has the fix.

Comment 4 Arvin Schnell 2021-01-08 17:23:12 UTC

Thanks for the link. I have the same problem and the newer kernel works.

*** This bug has been marked as a duplicate of bug 1180543 ***

Comment 5 Frank Krüger 2021-01-08 17:26:27 UTC

JFYI: Kernel 5.10.5 is on its way to TW (https://build.opensuse.org/request/show/860967)