Nouveau - Dec 2017 - [Bug 104109] New: After upgrade to kernel 4.13.16-302 one monitor in a two monitor displayport setup isn't working anymore.

https://bugs.freedesktop.org/show_bug.cgi?id=104109

            Bug ID: 104109
           Summary: After upgrade to kernel 4.13.16-302 one monitor in a
                    two monitor displayport setup isn't working anymore.
           Product: xorg
           Version: unspecified
          Hardware: Other
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: torsten at intsec.org
        QA Contact: xorg-team at lists.x.org

Created attachment 135975
  --> https://bugs.freedesktop.org/attachment.cgi?id=135975&action=edit
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

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--- Comment #1 from torsten at intsec.org ---
Created attachment 135976
  --> https://bugs.freedesktop.org/attachment.cgi?id=135976&action=edit
kernel log (4.13.16-302)

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--- Comment #2 from torsten at intsec.org ---
Created attachment 135977
  --> https://bugs.freedesktop.org/attachment.cgi?id=135977&action=edit
xrandr output

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--- Comment #3 from torsten at intsec.org ---
Created attachment 135978
  --> https://bugs.freedesktop.org/attachment.cgi?id=135978&action=edit
xrandr output

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Martin Peres <martin.peres at free.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |MOVED
             Status|NEW                         |RESOLVED

--- Comment #4 from Martin Peres <martin.peres at free.fr> ---
-- GitLab Migration Automatic Message --

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

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