Comment 8 for bug 574137

Sorry. Typo. It was the 2.6.32-21-generic package. Here are the last two entries in /var/log/apt/history.log.

Start-Date: 2010-05-02 21:37:13
Install: linux-alsa-driver-modules-2.6.32-21-generic (2.6.32-21.201004280600)
Remove: linux-backports-modules-alsa-2.6.32-21-generic (2.6.32-21.11), linux-backports-modules-alsa-lucid-generic (2.6.32.21.22)
End-Date: 2010-05-02 21:38:20

Start-Date: 2010-05-02 21:40:40
Upgrade: pulseaudio (0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu14, 0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu15~~lucid~ubuntuaudiodev2), libpulse-mainloop-glib0 (0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu14, 0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu15~~lucid~ubuntuaudiodev2), pulseaudio-module-bluetooth (0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu14, 0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu15~~lucid~ubuntuaudiodev2), pulseaudio-module-x11 (0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu14, 0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu15~~lucid~ubuntuaudiodev2), pulseaudio-utils (0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu14, 0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu15~~lucid~ubuntuaudiodev2), pulseaudio-module-gconf (0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu14, 0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu15~~lucid~ubuntuaudiodev2), libpulse0 (0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu14, 0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu15~~lucid~ubuntuaudiodev2), libpulse-browse0 (0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu14, 0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu15~~lucid~ubuntuaudiodev2), pulseaudio-esound-compat (0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu14, 0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu15~~lucid~ubuntuaudiodev2)
End-Date: 2010-05-02 21:41:11