I've tried pulseaudio-0.9.22/0.9.23/0.99.4 on two machines using linux-2.6.33.3 and the udev detection works. If I try the above on the same machines using linux-3.0.3, udev detection does not detect my hardware (but I can use pulseaudio to stream music to Bluetooth headphones). Alsa works on the two machines with linux-2.6.33.3 and linux-3.0.3. About the only difference between the linux-2.6.33.3 setup and the linux-3.0.3 setup is the version of libc - the udev version is the same on both and the following look to be the same: 25-alsa.rules 78-sound-card.rules 90-pulseaudio.rules Does anyone have any ideas as to what troubleshooting I can try? pulseaudio -vv ... D: [pulseaudio] cli-command.c: Checking for existence of '/usr/local/lib/pulse-0.99/modules/module-udev-detect.so': success I: [pulseaudio] module-udev-detect.c: Found 0 cards. I: [pulseaudio] module.c: Loaded "module-udev-detect" (index: #4; argument: "")