USB Issues

Audio Applications Might Stop Working After a USB Audio Device Is Hot-Unplugged (4424286)

If you hot-unplug a USB audio device the links to /dev/audio are broken. As a result, some audio applications might not recognize audio devices, including on-board audio. Rebooting the system or hot-plugging the USB audio device has no effect.

Workaround: Perform the following steps after a USB audio device is hot-unplugged.

1. Become superuser.

2. Correct the broken links by typing the following on a command line.

   # rm /dev/audio* # /usr/sbin/devfsadm -c audio

For more information see devfsadm(1M).

USB Speakers Might Not Produce Sound

Third-party USB speakers might not produce sound after the USB driver is attached. Increasing the speaker volume or hot-plugging the device might not have any effect.

Workaround: Power cycle the USB speakers.