Syslog output from non working kernel with failed probe message:
May 27 22:12:55 ThinkPad-T550 kernel: [ 50.880075] usb 2-3: new full-speed USB device number 5 using xhci_hcd
May 27 22:12:55 ThinkPad-T550 kernel: [ 51.040249] usb 2-3: New USB device found, idVendor=19b5, idProduct=0021
May 27 22:12:55 ThinkPad-T550 kernel: [ 51.040251] usb 2-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
May 27 22:12:55 ThinkPad-T550 kernel: [ 51.040252] usb 2-3: Product: PX USB
May 27 22:12:55 ThinkPad-T550 kernel: [ 51.040254] usb 2-3: Manufacturer: Bowers & Wilkins
May 27 22:12:55 ThinkPad-T550 kernel: [ 51.040255] usb 2-3: SerialNumber: ABCDEF0123456789
May 27 22:12:55 ThinkPad-T550 mtp-probe: checking bus 2, device 5: "/sys/devices/pci0000:00/0000:00:14.0/usb2/2-3"
May 27 22:12:55 ThinkPad-T550 mtp-probe: bus: 2, device: 5 was not an MTP device
May 27 22:12:55 ThinkPad-T550 kernel: [ 51.074237] hidraw: raw HID events driver (C) Jiri Kosina
May 27 22:12:55 ThinkPad-T550 kernel: [ 51.099805] snd-usb-audio: probe of 2-3:1.0 failed with error -22
May 27 22:12:55 ThinkPad-T550 kernel: [ 51.107942] usb 2-3: 2:1: cannot get min/max values for control 2 (id 2)
May 27 22:12:55 ThinkPad-T550 kernel: [ 51.107984] snd-usb-audio: probe of 2-3:1.1 failed with error -22
May 27 22:12:55 ThinkPad-T550 kernel: [ 51.112502] usbcore: registered new interface driver snd-usb-audio
May 27 22:12:55 ThinkPad-T550 kernel: [ 51.115517] usbcore: registered new interface driver usbhid
May 27 22:12:55 ThinkPad-T550 kernel: [ 51.115518] usbhid: USB HID core driver
May 27 22:12:55 ThinkPad-T550 kernel: [ 51.121643] input: Bowers & Wilkins PX USB as /devices/pci0000:00/0000:00:14.0/usb2/2-3/2-3:1.2/0003:19B5:0021.000
1/input/input19
Syslog output from non working kernel with failed probe message:
May 27 22:12:55 ThinkPad-T550 kernel: [ 50.880075] usb 2-3: new full-speed USB device number 5 using xhci_hcd pci0000: 00/0000: 00:14.0/ usb2/2- 3" pci0000: 00/0000: 00:14.0/ usb2/2- 3/2-3:1. 2/0003: 19B5:0021. 000
May 27 22:12:55 ThinkPad-T550 kernel: [ 51.040249] usb 2-3: New USB device found, idVendor=19b5, idProduct=0021
May 27 22:12:55 ThinkPad-T550 kernel: [ 51.040251] usb 2-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
May 27 22:12:55 ThinkPad-T550 kernel: [ 51.040252] usb 2-3: Product: PX USB
May 27 22:12:55 ThinkPad-T550 kernel: [ 51.040254] usb 2-3: Manufacturer: Bowers & Wilkins
May 27 22:12:55 ThinkPad-T550 kernel: [ 51.040255] usb 2-3: SerialNumber: ABCDEF0123456789
May 27 22:12:55 ThinkPad-T550 mtp-probe: checking bus 2, device 5: "/sys/devices/
May 27 22:12:55 ThinkPad-T550 mtp-probe: bus: 2, device: 5 was not an MTP device
May 27 22:12:55 ThinkPad-T550 kernel: [ 51.074237] hidraw: raw HID events driver (C) Jiri Kosina
May 27 22:12:55 ThinkPad-T550 kernel: [ 51.099805] snd-usb-audio: probe of 2-3:1.0 failed with error -22
May 27 22:12:55 ThinkPad-T550 kernel: [ 51.107942] usb 2-3: 2:1: cannot get min/max values for control 2 (id 2)
May 27 22:12:55 ThinkPad-T550 kernel: [ 51.107984] snd-usb-audio: probe of 2-3:1.1 failed with error -22
May 27 22:12:55 ThinkPad-T550 kernel: [ 51.112502] usbcore: registered new interface driver snd-usb-audio
May 27 22:12:55 ThinkPad-T550 kernel: [ 51.115517] usbcore: registered new interface driver usbhid
May 27 22:12:55 ThinkPad-T550 kernel: [ 51.115518] usbhid: USB HID core driver
May 27 22:12:55 ThinkPad-T550 kernel: [ 51.121643] input: Bowers & Wilkins PX USB as /devices/
1/input/input19