Hi all. I'm hoping you can shed some light on a problem I have with a DJ controller (Vestax VCI-100MKII) that's also a soundcard. My problem is that when I connect it, it keeps disconnecting. I've tested this on two laptops, both running Ubuntu 20.04. One a bit older and newer one that only has USB-C, so on the newer one I connect the controller via a USB hub. syslog on the older laptop: Nov 30 14:33:12 wintermute kernel: [ 936.225155] usb 3-2: new full- speed USB device number 14 using xhci_hcd Nov 30 14:33:12 wintermute kernel: [ 936.373108] usb 3-2: New USB device found, idVendor=1aa1, idProduct=0220, bcdDevice= 1.00 Nov 30 14:33:12 wintermute kernel: [ 936.373120] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 Nov 30 14:33:12 wintermute kernel: [ 936.373123] usb 3-2: Product: VCI-100MKII DJ-Controller Nov 30 14:33:12 wintermute kernel: [ 936.373125] usb 3-2: Manufacturer: Vestax Nov 30 14:33:12 wintermute kernel: [ 936.380745] usb 3-2: current rate 48000 is different from the runtime rate 44100 Nov 30 14:33:12 wintermute kernel: [ 936.382717] usb 3-2: current rate 48000 is different from the runtime rate 44100 Nov 30 14:33:12 wintermute kernel: [ 936.386780] usbhid 3-2:1.5: can't add hid device: -71 Nov 30 14:33:12 wintermute kernel: [ 936.386793] usbhid: probe of 3- 2:1.5 failed with error -71 Nov 30 14:33:12 wintermute kernel: [ 936.387200] usb 3-2: USB disconnect, device number 14 Nov 30 14:33:12 wintermute systemd-udevd[12281]: controlC2: /usr/lib/udev/rules.d/78-sound-card.rules:5 Failed to write ATTR{/sys/devices/pci0000:00/0000:00:14.0/usb3/3-2/3- 2:1.0/sound/card2/controlC2/../uevent}, ignoring: No such file or directory syslog on the newer laptop: Nov 30 15:45:00 ono-sendai kernel: [107245.521851] usb 3-8.3: new full- speed USB device number 91 using xhci_hcd Nov 30 15:45:00 ono-sendai kernel: [107245.704167] usb 3-8.3: New USB device found, idVendor=1aa1, idProduct=0220, bcdDevice= 1.00 Nov 30 15:45:00 ono-sendai kernel: [107245.704171] usb 3-8.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0 Nov 30 15:45:00 ono-sendai kernel: [107245.704172] usb 3-8.3: Product: VCI-100MKII DJ-Controller Nov 30 15:45:00 ono-sendai kernel: [107245.704174] usb 3-8.3: Manufacturer: Vestax Nov 30 15:45:00 ono-sendai kernel: [107245.722561] usb 3-8.3: 1:1: cannot set freq 44100 to ep 0x2 Nov 30 15:45:00 ono-sendai kernel: [107245.725923] usb 3-8.3: 2:1: cannot set freq 44100 to ep 0x82 Nov 30 15:45:00 ono-sendai kernel: [107245.732227] usbhid 3-8.3:1.5: can't add hid device: -32 Nov 30 15:45:00 ono-sendai kernel: [107245.732236] usbhid: probe of 3- 8.3:1.5 failed with error -32 Nov 30 15:45:00 ono-sendai mtp-probe: checking bus 3, device 91: "/sys/devices/pci0000:00/0000:00:14.0/usb3/3-8/3-8.3" Nov 30 15:45:00 ono-sendai mtp-probe: bus: 3, device: 91 was not an MTP device Nov 30 15:45:01 ono-sendai kernel: [107245.890782] usb 3-8.3: USB disconnect, device number 91 Nov 30 15:45:01 ono-sendai systemd-udevd[127098]: controlC7: /usr/lib/udev/rules.d/78-sound-card.rules:5 Failed to write ATTR{/sys/devices/pci0000:00/0000:00:14.0/usb3/3-8/3-8.3/3- 8.3:1.0/sound/card7/controlC7/../uevent}, ignoring: No such file or directory Nov 30 15:45:01 ono-sendai systemd-udevd[127098]: controlC7: Process '/usr/sbin/alsactl -E HOME=/run/alsa -E XDG_RUNTIME_DIR=/run/alsa/runtime restore ' failed with exit code 99. add hid device". Any idea on what is going wrong? I'm coming up empty with my google searches. :-( Cheers /Daniel