Nouveau - Sep 2018 - [Bug 108022] New: Cannot resume from standby - Link training fails

https://bugs.freedesktop.org/show_bug.cgi?id=108022

            Bug ID: 108022
           Summary: Cannot resume from standby - Link training fails
           Product: xorg
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: barry at grussling.com
        QA Contact: xorg-team at lists.x.org

Created attachment 141689
  --> https://bugs.freedesktop.org/attachment.cgi?id=141689&action=edit
DMESG with nvkm_dp_train_pattern failure.  At 3468 is the manual re-plug

My computer (X10DAX motherboard, Nvidia GTX 980, dual Xeon E5) fails to come
back if it goes to DPMS standby with:
WARNING: CPU: 3 PID: 8 at drivers/gpu/drm/nouveau/include/nvkm/subdev/i2c.h:170
nvkm_dp_train_pattern+0x12e/0x150 [nouveau]

I am running 4.18.9 of the kernel.

The GTX 980s are hooked to dual Dell P2715Q monitors.  The monitors have a
steady glowing power LED until I attempt to resume by moving the mouse at which
point they say not connected and the power led starts flashing.

If I remove the re-insert the DP cable(s) the monitors come back.

Note that I am doing no suspending nor hibernation.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://lists.freedesktop.org/archives/nouveau/attachments/20180922/536eec0b/attachment.html>

https://bugs.freedesktop.org/show_bug.cgi?id=108022

--- Comment #1 from Barry G <barry at grussling.com> ---
Created attachment 141690
  --> https://bugs.freedesktop.org/attachment.cgi?id=141690&action=edit
Xorg logfile.  Failed resume at 2290 and manual plug event at 3468

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://lists.freedesktop.org/archives/nouveau/attachments/20180922/951cc533/attachment.html>

https://bugs.freedesktop.org/show_bug.cgi?id=108022

--- Comment #2 from Ilia Mirkin <imirkin at alum.mit.edu> ---
There have been a variety of DP-MST-related fixes recently, both in nouveau as
well as the drm subsystem courtesy of Lyude. Could you try 4.19-rc4 or later?
(No clue if those fixes affect your situation, but easy enough to check.)

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://lists.freedesktop.org/archives/nouveau/attachments/20180922/038e0ccc/attachment.html>

https://bugs.freedesktop.org/show_bug.cgi?id=108022

--- Comment #3 from Barry G <barry at grussling.com> ---
Created attachment 141691
  --> https://bugs.freedesktop.org/attachment.cgi?id=141691&action=edit
dmesg with 4.19-rc4 plus

Upgraded to:
4.19.0-rc4-1-barrgr-00089-g6ad49fa1993d

Same general issue.  Got some new "gr:" lines.  Full dmesg attached.

A few things I have noticed:
* The unplug/replug monitor thing doesn't always fix it.  Sometimes they
just
stay off.
* If I run "xset dpms force standby" and wait 5-10 seconds and move
the mouse
it seems to always come back (5 tests).
* If I run "xset dpms force standby" and wait 40 seconds and move the
mouse it
seems to NOT come back (3 tests).

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://lists.freedesktop.org/archives/nouveau/attachments/20180922/3bc84dc9/attachment.html>

https://bugs.freedesktop.org/show_bug.cgi?id=108022

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

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

--- 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
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/458.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://lists.freedesktop.org/archives/nouveau/attachments/20191204/d772fc19/attachment.html>