On Sat, Feb 01, 2020 at 10:58:29AM -0300, edes wrote: > Hello, list, I hope this is the right place to post this problem. > > Changes introduced in 5.4.11 (seemingly, in drivers/usb/core/config.c) > cause problems with at least some models of USB sound cards. > > I have a Sound Devices USBPre2, a high quality sound card that until > 5.4.10 always worked perfectly out of the box as a standard USB audio > device. > > Beginning with 5.4.11 and up to 5.5.0, when the sound card is connected, > dmesg shows: > > [ 1310.743135] usb 3-10.3: new high-speed USB device number 6 using > xhci_hcd > [ 1310.755472] usb 3-10.3: config 1 interface 2 altsetting 1 has > a duplicate endpoint with address 0x85, skipping > [ 1310.755474] usb 3-10.3: config 1 interface 2 altsetting 2 has a > duplicate endpoint with address 0x85, skipping > [ 1310.755852] usb 3-10.3: New USB device found, idVendor=0926, > idProduct=0202, bcdDevice= 1.00 > [ 1310.755853] usb 3-10.3: New USB device strings: Mfr=1, Product=2, > SerialNumber=3 > [ 1310.755854] usb 3-10.3: Product: USBPre2 > [ 1310.755855] usb 3-10.3: Manufacturer: Sound Devices > [ 1310.755855] usb 3-10.3: SerialNumber: HB1116132005 > [ 1310.756803] usb 3-10.3: 1:3 : UAC_AS_GENERAL descriptor not found > [ 1310.757550] hid-generic 0003:0926:0202.0005: hiddev96: USB HID v1.01 > Device > [Sound Devices USBPre2] on usb-0000:00:14.0-10.3/input3 > [ 1310.773161] systemd-udevd[3856]: controlC0: Process '/usr/sbin/alsactl > restore 0' failed with exit code 99. > > No capture device is created under /dev/snd, and the card works only as a > playback device. Can you please post the output of "lsusb -v" for this device on 5.4.10 and 5.4.11, respectively? Johan
