experienced problem:
When I plug a headphones into the front panel audio connector, sound comes from both back panel connected speakers and front panel connected headphones. The sound profile remains at 5.1 channels.
expected behavior:
The back panel audio should be muted/disabled when plugging and unmuted/enabled when unplugging the front panel connector. Also, it would be nice, if the audio profile switches to stereo when something is plugged to the front panel line-out, and back to the previous profile when unplugged. (I didn't find anything about it being implemented to the linux sound stack though.)
what I did try and find out so far:
- installed https://wiki.ubuntu.com/Audio/InstallingLinuxAlsaDriverModules (with kernel 2.6.35-24-generic)
- "aplay -l" does not list a seperate front panel audio device (output included).
- I wanted to retrieve a codec dump (as in https://wiki.ubuntu.com/ALSA/JackSense) but there are no files matching /proc/asound/card*/codec*.
Any ideas where to find more useful debug output? I'm willing to dig a little deeper but I didn't find hints on where to look for plugging/unplugging events. At least dmesg remains unchanged.
ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: alsa-base 1.0.23+dfsg-1ubuntu4
Uname: Linux 2.6.37-custom1 x86_64
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: XFi [Creative X-Fi], device 0: ctxfi [Front/WaveIn]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: malte 2378 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'XFi'/'Creative X-Fi 20K2 SB0880'
Mixer name : '20K2'
Components : ''
Controls : 29
Simple ctrls : 10
Date: Thu Jan 13 15:35:48 2011
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
PackageArchitecture: all
ProcEnviron:
LANGUAGE=de_DE:de:en_GB:en_US:en
LANG=de_DE.utf8
SHELL=/bin/bash
SourcePackage: alsa-driver
dmi.bios.date: 12/30/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: V1.12
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P35 Platinum(MS-7345)
dmi.board.vendor: MICRO-STAR INTERNATIONAL CO.,LTD
dmi.board.version: 1.0
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: MICRO-STAR INTERNATIONAL CO.,LTD
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV1.12:bd12/30/2009:svnMICRO-STARINTERNATIONALCO.,LTD:pnP35Platinum(MS-7345):pvr1.0:rvnMICRO-STARINTERNATIONALCO.,LTD:rnP35Platinum(MS-7345):rvr1.0:cvnMICRO-STARINTERNATIONALCO.,LTD:ct3:cvr1.0:
dmi.product.name: P35 Platinum(MS-7345)
dmi.product.version: 1.0
dmi.sys.vendor: MICRO-STAR INTERNATIONAL CO.,LTD
I almost forgot: symptoms are identical with 2.6.35-24-generic and the reporting kernel 2.6.37 from Linus' git. I can provide the -35 reports as well if necessary and see what diff tells me about them.