Bug 77045

Summary: [NVC1] HDMI-Monitor toogles between on/off
Product: xorg Reporter: bugs.freedesktop.org
Component: Driver/nouveauAssignee: Nouveau Project <nouveau>
Status: RESOLVED INVALID QA Contact: Xorg Project Team <xorg-team>
Severity: normal    
Priority: medium    
Version: 7.7 (2012.06)   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
dmesg > dmesg.txt none

Description bugs.freedesktop.org 2014-04-04 08:59:05 UTC
Created attachment 96893 [details]
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
Comment 1 Ilia Mirkin 2014-04-04 13:59:55 UTC
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.
Comment 2 bugs.freedesktop.org 2014-04-06 22:16:51 UTC
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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