Bug 104109

Summary: After upgrade to kernel 4.13.16-302 one monitor in a two monitor displayport setup isn't working anymore.
Product: xorg Reporter: torsten
Component: Driver/nouveauAssignee: Nouveau Project <nouveau>
Status: RESOLVED MOVED QA Contact: Xorg Project Team <xorg-team>
Severity: major    
Priority: medium    
Version: unspecified   
Hardware: Other   
OS: Linux (All)   
i915 platform: i915 features:
Description Flags
kernel log (4.13.16-300)
kernel log (4.13.16-302)
xrandr output
xrandr output none

Description torsten 2017-12-05 14:14:37 UTC
Created attachment 135975 [details]
kernel log (4.13.16-300)

This issue comes in two parts which may be related to each other.
First when upgrading to kernel 4.13.16-300 I began to have issues with one monitor when it went into sleep mode. I then saw errors like "disp: outp 03:0006:0f88: training failed". Checking xrandr showed that the monitor "existed" but it only showed a black screen.
This behaviour was tested on both fedora 27 and ubuntu 16.04 LTS with all updates installed.

The dual monitor setup was working prior to updating to kernel 4.13.16-300.

When doing a kernel upgrade to 4.13.16-302 this monitor was not even found anymore by the nouveau driver.

I will attach the following files:
* kernel log 4.13.16-300
* kernel log 4.13.16-302
* xrandr when running kernel 4.13.16-300
* xrandr when running kernel 4.13.16-302
Comment 1 torsten 2017-12-05 14:15:41 UTC
Created attachment 135976 [details]
kernel log (4.13.16-302)
Comment 2 torsten 2017-12-05 14:16:20 UTC
Created attachment 135977 [details]
xrandr output
Comment 3 torsten 2017-12-05 14:19:05 UTC
Created attachment 135978 [details]
xrandr output
Comment 4 Martin Peres 2019-12-04 09:34:06 UTC
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/xorg/driver/xf86-video-nouveau/issues/387.

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.