PS: Something worked and stopped working for no obviously reason. We are clueless. We aren't aware of any rational cause. If so, trial and error troubleshooting should beginn with anything half-way reasonable we are able to imagine, even troubleshooting much unlikely causes. Actually I experienced both in once for an class compliant audio device used with iOS. There indeed was an USB power issue, but after solving this by an active USB hub, it still was impossible to record, just playback worked. To funny, the same device worked without issues with my Linux machine. The USB audio device of another vendor works without issues on my Linux machine as well as on my iOS devices. It wasn't just an user error, it was the device and/or the class compliant driver that failed. In my case Linux didn't fail, it was iOS that failed. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx https://lists.linuxaudio.org/listinfo/linux-audio-user
