[Bug 657874] [NEW] Screen blinks when playing video with S/PDIF audio enabled (Intel G45)

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When I enable ALSA and S/PDIF output in for example VLC or mplayer, my
whole screen starts blinking upon video playback. It affects the desktop
as well. The screen colours/contrast keep blinking with a constant
frequency until I stop the video playback. It does not matter which
video output I use or what kind of video I am playing (happens with all
codecs I tried). I am using an Intel G45 integrated video and audio with
Intel's own graphics driver. Video is connected through DVI and audio
through the optical connector.

This bug only affects Ubuntu 10.10 - in 10.04 everything worked. I am
running the 64 bit variant. I do not know whether this happens in the 32
bit version.

I also do not know whether the bug is in the Intel drivers, ALSA, xorg
or the video players themselves, or even somewhere else.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: xorg 1:7.5+6ubuntu3
ProcVersionSignature: Ubuntu 2.6.35-22.33-generic 2.6.35.4
Uname: Linux 2.6.35-22-generic x86_64
Architecture: amd64
DRM.card0.DisplayPort.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes: 
 edid-base64:
DRM.card0.DisplayPort.2:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes: 
 edid-base64:
DRM.card0.HDMI_Type_A.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes: 
 edid-base64:
DRM.card0.HDMI_Type_A.2:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1360x768 1280x720 1280x720 1024x768 800x600 720x576 720x480 640x480
 edid-base64: AP///////wA4uHMQAQAAABgQAQOAXTR4CjIwplRGmCQRSUshCAABAQEBAQEBAQEBAQEBAQEBGyFQoFEAGjBIiDUAogsyAAAYAR0AclHQHiBuKFUAogsyAAAeAAAA/QAxPQ8uCAAKICAgICAgAAAA/ABUNDIxMU4ACiAgICAgAXICAx9xTBAfBhUHFoUEFBMSAyMJFweDAQAAZQMMABAAAR2A0HIcFiAQLCWAogsyAACeAR0AvFLQHiC4KFVAogsyAAAejArQkCBAMSAMQFUAogsyAAAYjArQiiDgLRAQPpYAogsyAAAYAR2AGHEcFiBYLCUAogsyAACeAAAAAAAAfw==
DRM.card0.VGA.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes: 
 edid-base64:
Date: Sun Oct 10 22:16:40 2010
ProcCmdLine: BOOT_IMAGE=/vmlinuz-2.6.35-22-generic root=/dev/mapper/hostname-root ro quiet splash
ProcEnviron:
 LANG=en_US.utf8
 SHELL=/bin/bash
SourcePackage: xorg
Symptom: display
dmi.bios.date: 04/28/2009
dmi.bios.vendor: Intel Corp.
dmi.bios.version: IDG4510H.86A.0097.2009.0428.1627
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: DG45ID
dmi.board.vendor: Intel Corporation
dmi.board.version: AAE27729-310
dmi.chassis.type: 3
dmi.modalias: dmi:bvnIntelCorp.:bvrIDG4510H.86A.0097.2009.0428.1627:bd04/28/2009:svn:pn:pvr:rvnIntelCorporation:rnDG45ID:rvrAAE27729-310:cvn:ct3:cvr:
system:
 distro:             Ubuntu
 codename:           maverick
 architecture:       x86_64
 kernel:             2.6.35-22-generic

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug maverick
-- 
Screen blinks when playing video with S/PDIF audio enabled (Intel G45)
https://bugs.launchpad.net/bugs/657874
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