Also happens to my T440s. Runing Linux Mint 16 with Xfce (Ubuntu 13.10).
Restarting pulseaudio helps.
Restart with: killall pulseaudio /usr/bin/pulseaudio --start --log-target=syslog
Also happens to my T440s. Runing Linux Mint 16 with Xfce (Ubuntu 13.10).
Restarting pulseaudio helps.
Restart with:
killall pulseaudio
/usr/bin/pulseaudio --start --log-target=syslog