Bug 104109 - After upgrade to kernel 4.13.16-302 one monitor in a two monitor displayport setup isn't working anymore.
Summary: After upgrade to kernel 4.13.16-302 one monitor in a two monitor displayport ...
Status: RESOLVED MOVED
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/nouveau (show other bugs)
Version: unspecified
Hardware: Other Linux (All)
: medium major
Assignee: Nouveau Project
QA Contact: Xorg Project Team
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2017-12-05 14:14 UTC by torsten
Modified: 2019-12-04 09:34 UTC (History)
0 users

See Also:
i915 platform:
i915 features:

Attachments
kernel log (4.13.16-300) (74.25 KB, text/plain)
2017-12-05 14:14 UTC, torsten 		no flags Details
kernel log (4.13.16-302) (70.37 KB, text/plain)
2017-12-05 14:15 UTC, torsten 		no flags Details
xrandr output (1.21 KB, text/plain)
2017-12-05 14:16 UTC, torsten 		no flags Details
xrandr output (10.99 KB, text/plain)
2017-12-05 14:19 UTC, torsten 		no flags Details
View All

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 
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