[Bug 108561] New: nouveau: external monitor can not be enabled with hindsight

[Bug 108561] New: nouveau: external monitor can not be enabled with hindsight

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=108561

            Bug ID: 108561
           Summary: nouveau: external monitor can not be enabled with
                    hindsight
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.2.5-1-ARCH #1 SMP PREEMPT Tue Oct 27 08:13:28 CET
                    2015
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: estellnb@elstel.org
        Regression: No

Whenever I boot without an external monitor enabled then I get problems trying
to enable my u2868pqu monitor with hindsight. Xorg will recognize and it will
let me configure the external monitor. However the external monitor will stay
black and without a signal in spite of being configured well.
  If I just reboot the X-server with the monitor cable unplugged then there
will be no problem in enabling my u2868pqu monitor. Consequently I would assume
this to be a kernel / nouveau module bug since it depends on boot time not on
the time when I start the X-server.
  Is there any way to post the external monitor if I have booted without it?
What would you believe is going wrong here with nouveau and the HDMI port?

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[Bug 108561] nouveau: external monitor can not be enabled with hindsight

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=108561

--- Comment #1 from Elmar Stellnberger <estellnb@elstel.org> ---
Created attachment 195641
  --> https://bugzilla.kernel.org/attachment.cgi?id=195641&action=edit
journalctl -b / messages

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[Bug 108561] nouveau: external monitor can not be enabled with hindsight

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=108561

--- Comment #2 from Elmar Stellnberger <estellnb@elstel.org> ---
Created attachment 195651
  --> https://bugzilla.kernel.org/attachment.cgi?id=195651&action=edit
journalctl since s2ram: external monitor does not awake

Same problem as soon as I send my machine into s2ram: The external monitor
stays dark 'no signal' afterwards.

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[Bug 108561] nouveau: external monitor can not be enabled with hindsight

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=108561

--- Comment #3 from Elmar Stellnberger <estellnb@elstel.org> ---
s2ram; new test results:
* when booted with nouveau.modeset=0 the external monitor is not enabled at all
(i.e. definitely a bug related to the nouveau kernel module).
* suspecting this to be backlight issue I have tried to boot into runlevel 1
with the following kernel parameters the nouveau module being loaded
 - video.use_bios_initial_backlight=0
 - video.use_native_backlight=1 
 - acpi_osi=
 Unfortunately none of the above kernel command line parameters did yield any
difference with respect to s2ram: the external monitor always got disabled by
suspend.

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[Bug 108561] nouveau: external monitor can not be enabled with hindsight

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=108561

--- Comment #4 from Elmar Stellnberger <estellnb@elstel.org> ---
Now I have tested it with the proprietary Nvidia 340.xx driver: s2ram works
flawlessly with the proprietary driver the external monitor getting re-enabled
normally. However the non-oss driver runs unstable on my machine and is not an
option. The bug is apparently a  driver issue and not a firmware/acpi problem.

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[Bug 108561] nouveau: external monitor can not be enabled with hindsight

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=108561

--- Comment #5 from Elmar Stellnberger <estellnb@elstel.org> ---
Created attachment 197481
  --> https://bugzilla.kernel.org/attachment.cgi?id=197481&action=edit
clean journal under runlevel 1 with s2ram at last

Would anyone mind to have a look at the logs or propose any further actions?

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[Bug 108561] nouveau: external monitor can not be enabled with hindsight

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=108561

--- Comment #6 from Elmar Stellnberger <estellnb@elstel.org> ---
It is really a pity that my NVIDIA Corporation G96M [GeForce 9600M GT] has been
crossed out of the list of supported cards since an update to kernel 4.3.3-2.
It has worked well with the nouveau driver except for this bug. Latest tests
have shown that the monitor can now be enabled with hindsight after booting;
however the monitor being disabled by s2ram is a problem that has persisted up
to now.

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[Bug 108561] nouveau: external monitor can not be enabled with hindsight

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=108561

--- Comment #7 from Elmar Stellnberger <estellnb@elstel.org> ---
Comment #6 is now resolved: Please excuse the panic; I think that there was
just a temporary configuration issue with Arch Linux (see also:
https://bugs.freedesktop.org/show_bug.cgi?id=93405); i.e. /dev/card0 needs some
time to appear; now let us go on with the s2ram issue as the issue with
enabling the monitor after boot is already resolved!

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[Bug 108561] nouveau: external monitor can not be enabled with hindsight

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=108561

--- Comment #8 from Elmar Stellnberger <estellnb@elstel.org> ---
... and now the external monitor stays black all the time no matter what I do
with xrandr/nouveau while the proprietary driver does happily continue to work.
It is a shame that nobody seems to care about this bug! Shall I trash this
notebook because of a driver issue?

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[Bug 108561] nouveau: external monitor can not be enabled with hindsight

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=108561

--- Comment #9 from Elmar Stellnberger <estellnb@elstel.org> ---
... gonna try it with kernel 4.4 now as I heard that there were certain
improvements ...

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[Bug 108561] nouveau: external monitor can not be enabled with hindsight

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=108561

Ilia Mirkin <imirkin@alum.mit.edu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |imirkin@alum.mit.edu

--- Comment #10 from Ilia Mirkin <imirkin@alum.mit.edu> ---
As you've probably noticed, no one from the nouveau team really looks at this
bug tracker. (I happened to notice this one because it's a slow day on the
dri-devel list.) I recommend filing bugs on bugs.freedesktop.org xorg ->
Driver/nouveau if you'd like the attention of the nouveau developers.

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[Bug 108561] nouveau: external monitor can not be enabled with hindsight

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=108561

Elmar Stellnberger <estellnb@elstel.org> changed:

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

--- Comment #11 from Elmar Stellnberger <estellnb@elstel.org> ---
bug has now been moved to freedesktop.org:
https://bugs.freedesktop.org/show_bug.cgi?id=93887

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