When going into standby, DP monitor emits horrible noises via attached speakers
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
alsa-driver (Ubuntu) |
Expired
|
Undecided
|
Unassigned |
Bug Description
I am using a Thinkpad T410s with a Dell 2711 connected via DisplayPort. Attached to the monitor, there is my speakers that I can use to listen to music that is transmitted via DisplayPort (or HDMI). Starting with Ubuntu 12.04, Ubuntu can transmit audio via DP.
However, when going into standby - either via inactivity timeout or via closing the lid - I hear horrible sound garbage.
This is quite loud and can possibly damage speakers and/or ears, depending on the sound level of whatever I heard before.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xserver-
ProcVersionSign
Uname: Linux 3.2.0-20-generic x86_64
.tmp.unity.
ApportVersion: 2.0-0ubuntu2
Architecture: amd64
CompizPlugins: [core,composite
CompositorRunning: compiz
Date: Sat Mar 31 12:42:13 2012
DistUpgraded: 2011-12-03 14:26:18,327 DEBUG enabling apt cron job
DistroCodename: precise
DistroVariant: ubuntu
ExtraDebuggingI
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110803.1)
MachineType: LENOVO 29123AG
ProcEnviron:
TERM=xterm
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=
SourcePackage: xserver-
UpgradeStatus: Upgraded to precise on 2011-12-03 (118 days ago)
dmi.bios.date: 05/10/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 6UET64WW (1.44 )
dmi.board.name: 29123AG
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.
dmi.modalias: dmi:bvnLENOVO:
dmi.product.name: 29123AG
dmi.product.
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.7.2-0ubuntu4
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.32-1ubuntu1
version.
version.
version.
version.
version.
version.
version.
version.
affects: | ubuntu → alsa-driver (Ubuntu) |
X.org does not handle sound anymore.