I installed Lucid beta on a new laptop, a Thinkpad Edge. It has one of those duplex, single mic+headphones jack. At first, all was working as expected - sound from speakers when no headphones, speakers muted when headphones plugged in - until I hit the mute button once. Now, I am getting rather erratic behaviour: most of the time sound is coming from the internal speakers when headphones are plugged in, sometimes sound comes from both speakers and headphones. I cannot get sound to come only from the headphones anymore.
I get the change in behaviour when changing the settings in the sound preferences, but not always, and not in any consistent way, so I cannot give more details.
Problem remains after a restart.
In Windows 7 (dual boot), things work as expected, so not a hardware problem.
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
Subdevice #0: subdevice #0
USER PID ACCESS COMMAND
/dev/snd/controlC0: geoffrey 1168 F.... pulseaudio
Card hw:0 'Intel'/'HDA Intel at 0xf0800000 irq 22'
Mixer name : 'Intel G45 DEVCTG'
Components : 'HDA:14f15066,17aa21b4,00100300 HDA:80862802,80860101,00100000'
Controls : 16
Simple ctrls : 11
[ 15.804555] ppdev: user-space parallel port driver
[ 22.664812] IBM TrackPoint firmware: 0x0e, buttons: 3/3
[ 22.947937] input: TPPS/2 IBM TrackPoint as /devices/platform/i8042/serio4/serio5/input/input8
[ 25.820016] eth0: no IPv6 routers present
Date: Sat Mar 27 10:12:38 2010
DistroRelease: Ubuntu 10.04
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Beta amd64 (20100318)
Package: alsa-base 126.96.36.199+dfsg-0ubuntu3
ProcVersionSignature: Ubuntu 2.6.32-17.26-generic 188.8.131.52+drm33.1
SelectedCard: 0 Intel HDA-Intel - HDA Intel
Title: [Conexant CX20582 (Pebble)] Playback problem
Uname: Linux 2.6.32-17-generic x86_64