@Daniel T Chen
I've installed this package and reboot, but the problem with pulseaudio still exists.
The sound works also before (without the linux-backports-modules-alsa-karmic-generic package), but its the problem that pulseaudio forces the PCM volume to 100%.
@Daniel T Chen -modules- alsa-karmic- generic package), but its the problem that pulseaudio forces the PCM volume to 100%.
I've installed this package and reboot, but the problem with pulseaudio still exists.
The sound works also before (without the linux-backports