On Sun, Mar 20, 2022 at 02:15:40AM +0100, Petr Janecek wrote:

Hi, I'm trying to use Apogee ONEv2. From usb dumps under macos or windows it seems like a usb Class Audio 2.0 device, but in linux, it keeps resetting every two seconds or so. It keeps resetting even when the snd-usb-audio driver is disabled, so the problem is probably at a lower level.

Can you post the log output on a system where snd-usb-audio is disabled?

The messages below are from v5.16.16, but it behaves the same no matter what I plug it into.

[ 253.708616] usb 3-8: new high-speed USB device number 6 using xhci_hcd [ 253.899363] usb 3-8: New USB device found, idVendor=0c60, idProduct=0017, bcdDevice= 1.05 [ 253.899370] usb 3-8: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 253.899373] usb 3-8: Product: ONEv2 [ 253.899375] usb 3-8: Manufacturer: Apogee [ 253.899377] usb 3-8: SerialNumber: 0C12FF2020204652334D513A7A2A9B [ 253.960901] mc: Linux media interface: v0.10

Any idea where that line came from?

You should try capturing a usbmon trace showing what happens when the device is plugged in and then resets. Preferably on a system where snd-usb-audio is disabled.

One other thing you might try: Disable runtime PM for USB ("echo -1

/sys/module/usbcore/parameters/autosuspend" before plugging in the

device).

Alan Stern