snd-usb-audio: Probe von 2-9.2: 1.0 schlug mit Fehler -22 fehl

Seit 6 Stunden habe ich im Internet gesucht und versucht, Bowers & Wilkins PX USB-Kopfhörer, die vor einigen Updates gut funktionierten, zum Laufen zu bringen - ohne Erfolg.

KUBUNTU 18.04 KDE-Plasmaversion: 5.12.6 KDE-Framework-Version: 5.44.0 Qt-Version: 5.9.5 Kernel-Version: 4.15.0.39-generic

# tail -fn 100 /var/log/syslog Nov 26 20:37:46 W540 kernel: [ 2318.093142] usb 2-9.2: new full-speed USB device number 12 using xhci_hcd Nov 26 20:37:46 W540 kernel: [ 2318.253691] usb 2-9.2: New USB device found, idVendor=19b5, idProduct=0021 Nov 26 20:37:46 W540 kernel: [ 2318.253695] usb 2-9.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 Nov 26 20:37:46 W540 kernel: [ 2318.253698] usb 2-9.2: Product: PX USB Nov 26 20:37:46 W540 kernel: [ 2318.253700] usb 2-9.2: Manufacturer: Bowers & Wilkins Nov 26 20:37:46 W540 kernel: [ 2318.253702] usb 2-9.2: SerialNumber: ABCDEF0123456789 Nov 26 20:37:46 W540 kernel: [ 2318.274581] snd-usb-audio: probe of 2-9.2:1.0 failed with error -22 Nov 26 20:37:46 W540 kernel: [ 2318.284691] usb 2-9.2: 2:1: cannot get min/max values for control 2 (id 2) Nov 26 20:37:46 W540 kernel: [ 2318.284715] snd-usb-audio: probe of 2-9.2:1.1 failed with error -22 Nov 26 20:37:46 W540 kernel: [ 2318.288917] input: Bowers & Wilkins PX USB as /devices/pci0000:00/0000:00:14.0/usb2/2-9/2-9.2/2-9.2:1.2/0003:19B5:0021.000B/input/input22 Nov 26 20:37:46 W540 mtp-probe: checking bus 2, device 12: "/sys/devices/pci0000:00/0000:00:14.0/usb2/2-9/2-9.2" Nov 26 20:37:46 W540 mtp-probe: bus: 2, device: 12 was not an MTP device Nov 26 20:37:46 W540 kernel: [ 2318.345390] hid-generic 0003:19B5:0021.000B: input,hiddev0,hidraw0: USB HID v1.11 Device [Bowers & Wilkins PX USB] on usb-0000:00:14.0-9.2/input2 Nov 26 20:37:46 W540 upowerd[3694]: unhandled action 'bind' on /sys/devices/pci0000:00/0000:00:14.0/usb2/2-9/2-9.2/2-9.2:1.2/0003:19B5:0021.000B Nov 26 20:37:46 W540 upowerd[3694]: unhandled action 'bind' on /sys/devices/pci0000:00/0000:00:14.0/usb2/2-9/2-9.2/2-9.2:1.2 Nov 26 20:37:46 W540 upowerd[3694]: unhandled action 'bind' on /sys/devices/pci0000:00/0000:00:14.0/usb2/2-9/2-9.2   # lsusb Bus 001 Device 002: ID 8087:8000 Intel Corp.  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 003: ID 174c:1351 ASMedia Technology Inc.  Bus 003 Device 002: ID 17ef:1010 Lenovo  Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 002 Device 011: ID 046d:c52b Logitech, Inc. Unifying Receiver Bus 002 Device 010: ID 046d:c52b Logitech, Inc. Unifying Receiver Bus 002 Device 009: ID 05e3:0608 Genesys Logic, Inc. Hub Bus 002 Device 007: ID 0000:0000  Bus 002 Device 012: ID 19b5:0021 B & W Group  Bus 002 Device 008: ID 1235:8200 Focusrite-Novation  Bus 002 Device 003: ID 17ef:1010 Lenovo  Bus 002 Device 002: ID 058f:9540 Alcor Micro Corp. AU9540 Smartcard Reader Bus 002 Device 006: ID 0765:5010 X-Rite, Inc.  Bus 002 Device 004: ID 8087:07dc Intel Corp.  Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub  # lshw -c multimedia *-multimedia:0  description: Audio device product: Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller vendor: Intel Corporation physical id: 3 bus info: pci@0000:00:03.0 version: 06 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list configuration: driver=snd_hda_intel latency=0 resources: irq:34 memory:b4a30000-b4a33fff *-usb:0 description: Audio device product: Scarlett 2i4 USB vendor: Focusrite physical id: 1 bus info: usb@2:9.1 version: 4.1b capabilities: usb-2.00 audio-control configuration: driver=snd-usb-audio maxpower=500mA speed=480Mbit/s *-usb:1 description: Audio device product: PX USB vendor: Bowers & Wilkins physical id: 2 bus info: usb@2:9.2 version: 25.20 serial: ABCDEF0123456789 capabilities: usb-2.00 audio-control configuration: driver=usbhid maxpower=500mA speed=12Mbit/s *-multimedia:1 description: Audio device product: 8 Series/C220 Series Chipset High Definition Audio Controller vendor: Intel Corporation physical id: 1b bus info: pci@0000:00:1b.0 version: 04 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list configuration: driver=snd_hda_intel latency=0 resources: irq:33 memory:b4a34000-b4a37fff  # lspci  00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor DRAM Controller (rev 06) 00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor PCI Express x16 Controller (rev 06) 00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06) 00:03.0 Audio device: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller (rev 06) 00:14.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB xHCI (rev 04) 00:16.0 Communication controller: Intel Corporation 8 Series/C220 Series Chipset Family MEI Controller #1 (rev 04) 00:19.0 Ethernet controller: Intel Corporation Ethernet Connection I217-LM (rev 04) 00:1b.0 Audio device: Intel Corporation 8 Series/C220 Series Chipset High Definition Audio Controller (rev 04) 00:1c.0 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #1 (rev d4) 00:1c.1 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #2 (rev d4) 00:1c.2 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #3 (rev d4) 00:1c.4 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #5 (rev d4) 00:1d.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #1 (rev 04) 00:1f.0 ISA bridge: Intel Corporation QM87 Express LPC Controller (rev 04) 00:1f.2 SATA controller: Intel Corporation 8 Series/C220 Series Chipset Family 6-port SATA Controller 1 [AHCI mode] (rev 04) 00:1f.3 SMBus: Intel Corporation 8 Series/C220 Series Chipset Family SMBus Controller (rev 04) 01:00.0 VGA compatible controller: NVIDIA Corporation GK106GLM [Quadro K2100M] (rev a1) 02:00.0 SD Host controller: O2 Micro, Inc. SD/MMC Card Reader Controller (rev 01) 03:00.0 Network controller: Intel Corporation Wireless 7260 (rev 83) 04:00.0 SATA controller: ASMedia Technology Inc. ASM1062 Serial ATA Controller (rev 01)