Graphical artifacts on playback controls (ivybridge)

[bwat47]

On my laptop with intel ivybridge graphics, the sound indicator has ugly graphical artifacts on the playback controls. This doesn't happen all the time. When I first boot the computer its fine for a while, but eventually this artifact appears and does not go away until a full reboot (even logging out/in doesn't help). My other laptop with ironlake graphics does not seem to have this issue. Screenshot attatched.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: indicator-sound 12.10.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
Uname: Linux 3.5.0-17-generic x86_64
ApportVersion: 2.6.1-0ubuntu6
Architecture: amd64
Date: Thu Nov 1 22:41:34 2012
InstallationDate: Installed on 2012-11-01 (0 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
MarkForUpload: True
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: indicator-sound
UpgradeStatus: No upgrade log present (probably fresh install)

[bwat47 (bwat47)]

Can no longer reproduce after another reboot though.

[bwat47 (bwat47)]

I've now seen this a few more times, can ONLY be fixed after a total reboot, logging out/in doesn't even work.

[bwat47 (bwat47)]

I recently switched over from 12.10 to 12.04 LTS and experience the exact same issue there. seemingly at random this happens and is only fixed by a full reboot.

[Bob Scott (screamin-jesus)]

Same here running 12.10 on ivybridge.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[bwat47 (bwat47)]

I also see this issue in xubuntu with its gtk2 sound indicator.

[bwat47 (bwat47)]

Not sure what changed, but appears to be fixed in quantal, I'll wait another week and see if it shows up again