Bug 108555

Summary:	Xorg loads, no display on 4.15.0-38 and 4.15.0-39, works on 4.15.0-36
Product:	xorg	Reporter:	Cristian Aravena <caravena>
Component:	Server/General	Assignee:	Xorg Project Team <xorg-team>
Status:	RESOLVED MOVED	QA Contact:	Xorg Project Team <xorg-team>
Severity:	normal
Priority:	medium	CC:	Tim
Version:	unspecified
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Cristian Aravena 2018-10-25 19:53:15 UTC

Hello,

Open bug in launchpad.net
https://bugs.launchpad.net/bugs/1799994

"Lenovo ThinkPad W540 docked with an ultradock. 3 external displays running on VGA, DVI and display port all connected to the dock. BIOS mode set to run external displays ONLY with nvidia chipset. prime-select nvidia run.

When running under 4.15.0-36-generic with nvidia 390.77-0ubuntu0.18.04.1 I boot and all three external displays run fine.

Upgrading to 4.15.0-38 and Xorg starts up, but none of the displays light up."

Best regards,
--
Cristian Aravena Romero (caravena)

Comment 1 Daniel van Vugt 2018-10-26 02:18:37 UTC

It appears to be a kernel issue, per the downstream bug report.

Comment 2 Tim Riker 2018-10-26 19:11:37 UTC

Looks like it happened the same time as a kernel upgrade, but it's not a kernel issue, it looks like an nvidia driver issue.

Comment 3 GitLab Migration User 2018-12-13 22:41:11 UTC

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