Bug 49061 - HDMI output clipped since commit of 'enable sending of avi/audio infoframes'
Summary: HDMI output clipped since commit of 'enable sending of avi/audio infoframes'
Status: RESOLVED INVALID
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/nouveau (show other bugs)
Version: git
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: Nouveau Project
QA Contact: Xorg Project Team
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2012-04-22 15:47 UTC by gitbisector
Modified: 2013-08-20 23:51 UTC (History)
2 users (show)

See Also:
i915 platform:
i915 features:

Attachments
drm output from 'dmesg' and output of 'xrandr --verbose' to hopefully describe my setup (15.27 KB, text/plain)
2012-04-22 15:47 UTC, gitbisector 		no flags Details
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Description gitbisector 2012-04-22 15:47:49 UTC 
Created attachment 60467 [details]
drm output from 'dmesg' and output of 'xrandr --verbose' to hopefully describe my setup

Since some time now 1920x1200 output on HDMI port of my nv50 based card shows two black bands on the left and right side of the screen. It's clipping (i.e. pieces of the desktop are not drawn), resolution seems to be correct. 

bisecting of the linux kernel got me here:

b2337f2333c0bdefc9b230da17ed7188e4eb7f6c is the first bad commit
commit b2337f2333c0bdefc9b230da17ed7188e4eb7f6c
Author: Ben Skeggs <bskeggs@redhat.com>
Date:   Wed Oct 5 14:59:14 2011 +1000

    drm/nouveau/hdmi: enable sending of avi/audio infoframes
    
    Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

:040000 040000 edc0d0e6f57362c38edb0845cf19ee076a045f0b 364748b5ea73b322991331396fb218d8afd65fe7 M	drivers

And indeed taking out these changes from the current 3.4.0-rc4 kernel seems to solve my problem.

Seems this enabling of avi/audio infoframes has some bad side effect for my hardware.
Comment 1 gitbisector 2012-04-22 16:54:10 UTC 
Found that my monitor is one of a number of types that assume HDTV when they receive audio infoframes:

http://www.voetsjoeba.com/misc/edid/
Comment 2 Ian Pilcher 2012-04-22 18:58:41 UTC 
Does the patch in this bug help?

  https://bugzilla.redhat.com/show_bug.cgi?id=806091
Comment 3 gitbisector 2012-04-23 21:54:32 UTC 
(In reply to comment #2)
> Does the patch in this bug help?
> 
>   https://bugzilla.redhat.com/show_bug.cgi?id=806091

Sure did, much cleaner than my dirty commenting out of the infoframes.
Comment 4 Emil Velikov 2012-05-21 12:34:22 UTC 
Would you mind trying the patch in bug 47846 comment 10
Comment 5 gitbisector 2012-07-21 03:53:30 UTC 
(In reply to comment #4)
> Would you mind trying the patch in bug 47846 comment 10

Sorry for missing this request. Is it still relevant for me to go test it? (Have converted to triplehead ATI card and Radeon open source driver with it's own set of problems since).
Comment 6 Ilia Mirkin 2013-08-20 23:51:58 UTC 
Closing issue since the original reporter no longer uses the hardware. And it sounds like the screens are buggy, not nouveau, and the fix is to massage their EDIDs, which is what the patches in the redhat bugzilla have done. Hopefully they'll go upstream if they haven't already.

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