Nouveau - Apr 2014 - [Bug 77045] New: HDMI-Monitor toogles between on/off

https://bugs.freedesktop.org/show_bug.cgi?id=77045

          Priority: medium
            Bug ID: 77045
          Assignee: nouveau at lists.freedesktop.org
           Summary: HDMI-Monitor toogles between on/off
        QA Contact: xorg-team at lists.x.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: bugs.freedesktop.org at guntramschmidt.de
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: 7.7 (2011)
         Component: Driver/nouveau
           Product: xorg

Created attachment 96893
  --> https://bugs.freedesktop.org/attachment.cgi?id=96893&action=edit
dmesg > dmesg.txt

Dear all,

my second monitor, attached via HDMI-DVI-Adapter keeps turning on/off every
~20min. This is independant on what I am doing! The xorg-screen itself seems to
remain active (windows can be dragged from and to it). The first monitor
remains active.

All Standby-Options are turned off (Monitor set to switch off after one hour).

I can reactivate the monitor by switching to a text-console (ALT-F1) and back
(ALT-F7). nvidia-driver works fine (switched using the provided option of the
proprietary drives section of the Softwaremanager, no nvidia remained after
switching back to nouveau).

lspci | grep VGA
03:00.0 VGA compatible controller: NVIDIA Corporation GF108 [GeForce GT 430]
(rev a1)

 lsb_release -rd
Description:    Ubuntu Trusty Tahr (development branch)
Release:    14.04

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https://bugs.freedesktop.org/show_bug.cgi?id=77045

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|HDMI-Monitor toogles        |[NVC1] HDMI-Monitor toogles
                   |between on/off              |between on/off

--- Comment #1 from Ilia Mirkin <imirkin at alum.mit.edu> ---
The fact that it works with the blob rules out a hardware issue in the
converter.

I've never heard of anything like this... mind booting with

nouveau.debug=PDISP=debug,VBIOS=trace drm.debug=0xe

and waiting for the issue to occur, and grabbing dmesg after that? That should
give us an idea of who is turning the monitor off.

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--- Comment #2 from bugs.freedesktop.org at guntramschmidt.de ---
Hi!

I don't know, wether a recent update helped (or the new kernel lines ;-) ) -
but atm the phenomenon doesn't occur anymore (after weeks of annoyance)...

This report can be closed - I'll reopen one, if the problem strikes again!

Thanks!

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

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

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