Bernardo Barros wrote: Okay, this device now has two configurations, one almost the same as the one forced by "1", and one for audio class 2.0. As long as the driver does not know that it needs to switch to the second configuration, it will use the first one. The only difference between the two audio class 1 configurations is that the "1" one has bInterval=1 for all endpoints while the other one has bInterval=4. This seems to trip up the driver; please show any error messages that show up in the system log (/var/log/messages or the output of dmesg) when you try to play something. We also need a quirk to enable the audio class 2.0 configuration. (This isn't really device-specific; this should probably be done for all devices with two such configurations.) Regards, Clemens