Public bug reported:

Since the kernel was updated and I installed linux-backports-modules-
alsa-karmic-generic, I got ALSA 1.0.22.1

$ cat /proc/asound/version 
Advanced Linux Sound Architecture Driver Version 1.0.22.1.
Compiled on Feb  8 2010 for kernel 2.6.31-20-generic (SMP).
$ 

And now I don't have sound.

If I use ALSA 1.0.20 or ALSA 1.0.21 it is OK.

I get sound either by removing linux-backports-modules-alsa-karmic-
generic or by choosing the previous kernel at boot (2.6.31-19).

ProblemType: Bug
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: VT82xx [HDA VIA VT82xx], device 0: ALC260 Analog [ALC260 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: VT82xx [HDA VIA VT82xx], device 0: ALC260 Analog [ALC260 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  leorolla   1786 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'VT82xx'/'HDA VIA VT82xx at 0xcb000000 irq 17'
   Mixer name   : 'Realtek ALC260'
   Components   : 'HDA:10ec0260,10710205,00100400'
   Controls      : 13
   Simple ctrls  : 7
CheckboxSubmission: 8dd9676589cd4ff8931b9c579ef790e3
CheckboxSystem: 83075ebc7d90de701d72276e79eb150c
CurrentDmesg:
 [   19.405019] ppdev: user-space parallel port driver
 [   20.352447] [drm] Initialized drm 1.1.0 20060810
 [   23.596325] hda-intel: IRQ timing workaround is activated for card #0. 
Suggest a bigger bdl_pos_adj.
 [   28.964029] eth0: no IPv6 routers present
Date: Fri Mar 26 13:06:02 2010
DistroRelease: Ubuntu 9.10
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
Package: alsa-base 1.0.20+dfsg-1ubuntu5
PackageArchitecture: all
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-20.58-generic
SourcePackage: alsa-driver
Uname: Linux 2.6.31-20-generic i686
XsessionErrors:
 (gnome-settings-daemon:1755): GLib-CRITICAL **: g_propagate_error: assertion 
`src != NULL' failed
 (gnome-settings-daemon:1755): GLib-CRITICAL **: g_propagate_error: assertion 
`src != NULL' failed
 (polkit-gnome-authentication-agent-1:1814): GLib-CRITICAL **: 
g_once_init_leave: assertion `initialization_value != 0' failed
 (nautilus:1800): Eel-CRITICAL **: eel_preferences_get_boolean: assertion 
`preferences_is_initialized ()' failed
 (gnome-panel:1793): Gdk-WARNING **: 
/build/buildd/gtk+2.0-2.18.3/gdk/x11/gdkdrawable-x11.c:952 drawable is not a 
pixmap or window

** Affects: alsa-driver (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386

-- 
Regression: No sound after upgrade to ALSA 1.0.22.1
https://bugs.launchpad.net/bugs/548755
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