Public bug reported:
After upgrading to karmic (or after one of its normal updates - sorry) I had no
sound output from the speakers from any application on my HP 550 laptop.
Sound output via headphone works, and speakers were no problem before in jaunty
either.
I installed linux-backports-modules-alsa-karmic-generic with no effect.
After installing the updates from https://launchpad.net/~ubuntu-audio-dev the
headphones also stopped working with the default configuration (no model=
parameter for the snd-hda-intel module). They now work again with "options
snd-hda-intel model=basic" or "model=hp" in /etc/modprobe.d/alsa-base.conf .
Most information should be in
http://www.alsa-project.org/db/?f=1fad068e798f0fdc7563ba137172b7e4e9db9503
or http://www.alsa-project.org/db/?f=c1b7e0021d187f0f5b6dd55eb148784fc7e6a5ed
There are lots of similar bug messages here, none of which helped, so I picked
the most similar one
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/245062 and added my
current information. Now I issued this new one as recommended by Daniel T. Chen.
Please tell me how to help any further.
rol...@hp:~$ uname -a
Linux hp 2.6.31-15-generic #50-Ubuntu SMP Tue Nov 10 14:54:29 UTC 2009 i686
GNU/Linux
rol...@hp:~$ cat /proc/version_signature
Ubuntu 2.6.31-15.50-generic
** Affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
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HP550: No sound from laptop speakers, only from headphone in karmic
https://bugs.launchpad.net/bugs/492303
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