Getting the same effect on 12.04 , started happening after some update
in 2013 january
When i plug in headphones or pull them out then the machine goes on mute
and i have to restore the sound from alsamixer
$ dpkg -l | grep alsa
ii alsa-base 1.0.25+dfsg-0ubuntu1
ALSA driver configuration files
ii alsa-utils 1.0.25-1ubuntu5
Utilities for configuring and using ALSA
$ dpkg -l | grep pulse
ii gstreamer0.10-pulseaudio 0.10.31-1ubuntu1
GStreamer plugin for PulseAudio
ii libcanberra-pulse 0.28-3ubuntu3
PulseAudio backend for libcanberra
ii libpulse-mainloop-glib0 1:1.1-0ubuntu15.2
PulseAudio client libraries (glib support)
ii libpulse-mainloop-glib0:i386 1:1.1-0ubuntu15.2
PulseAudio client libraries (glib support)
ii libpulse0 1:1.1-0ubuntu15.2
PulseAudio client libraries
ii libpulse0:i386 1:1.1-0ubuntu15.2
PulseAudio client libraries
ii libpulsedsp 1:1.1-0ubuntu15.2
PulseAudio OSS pre-load library
ii libpulsedsp:i386 1:1.1-0ubuntu15.2
PulseAudio OSS pre-load library
rc libsdl1.2debian-pulseaudio 1.2.14-6.1ubuntu4
Simple DirectMedia Layer (with X11 and PulseAudio options)
ii pulseaudio 1:1.1-0ubuntu15.2
PulseAudio sound server
ii pulseaudio-esound-compat 1:1.1-0ubuntu15.2
PulseAudio ESD compatibility layer
ii pulseaudio-module-bluetooth 1:1.1-0ubuntu15.2
Bluetooth module for PulseAudio sound server
ii pulseaudio-module-gconf 1:1.1-0ubuntu15.2
GConf module for PulseAudio sound server
ii pulseaudio-module-x11 1:1.1-0ubuntu15.2
X11 module for PulseAudio sound server
ii pulseaudio-utils 1:1.1-0ubuntu15.2
Command line tools for the PulseAudio sound server
ii vlc-plugin-pulse 2.0.5-0ubuntu0.12.04.1
PulseAudio plugin for VLC
$ cat /proc/asound/cards
0 [Generic ]: HDA-Intel - HD-Audio Generic
HD-Audio Generic at 0xf0444000 irq 53
1 [Generic_1 ]: HDA-Intel - HD-Audio Generic
HD-Audio Generic at 0xf0440000 irq 16
it seems that card 0 is my ati hdmi and card 1 is the actual soundcard
on the motherboard
Laptop : HP Pavilion dv6
$ lspci -v | grep Audio -A2
00:01.1 Audio device: Advanced Micro Devices [AMD] nee ATI BeaverCreek HDMI
Audio [Radeon HD 6500D and 6400G-6600G series]
Subsystem: Hewlett-Packard Company Device 358d
Flags: bus master, fast devsel, latency 0, IRQ 53
--
00:14.2 Audio device: Advanced Micro Devices [AMD] Hudson Azalia Controller
(rev 01)
Subsystem: Hewlett-Packard Company Device 358d
Flags: bus master, slow devsel, latency 32, IRQ 16
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https://bugs.launchpad.net/bugs/921397
Title:
Speaker audio channel goes mute after plugging in the headphone
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