I also just saw this during a forced XHCI reset (after the USB bus failed to connect): ----8<---- [ 247.130032] usb 3-1.6.2.4: new low-speed USB device number 9 using xhci_hcd [ 247.388286] usb 3-1.6.2.4: New USB device found, idVendor=04d9, idProduct=2013, bcdDevice= 1.03 [ 247.388287] usb 3-1.6.2.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 247.388288] usb 3-1.6.2.4: Product: USB Keyboard [ 247.388289] usb 3-1.6.2.4: Manufacturer: [ 247.454042] usb 3-1.6.5: new high-speed USB device number 10 using xhci_hcd [ 247.511444] input: USB Keyboard as /devices/pci0000:00/0000:00:1d.6/0000:06:00.0/0000:07:01.0/0000:09:00.0/0000:0a:04.0/0000:0c:00.0/0000:0d:01.0/0000:0e:00.0/usb3/3-1/3-1.6/3-1.6.2/3-1.6.2.4/3-1.6.2.4:1.0/0003:04D9:2013.0014/input/input44 [ 247.570426] hid-generic 0003:04D9:2013.0014: input,hidraw4: USB HID v1.00 Keyboard [ USB Keyboard] on usb-0000:0e:00.0-1.6.2.4/input0 [ 247.583572] input: USB Keyboard System Control as /devices/pci0000:00/0000:00:1d.6/0000:06:00.0/0000:07:01.0/0000:09:00.0/0000:0a:04.0/0000:0c:00.0/0000:0d:01.0/0000:0e:00.0/usb3/3-1/3-1.6/3-1.6.2/3-1.6.2.4/3-1.6.2.4:1.1/0003:04D9:2013.0015/input/input45 [ 247.613793] usb 3-1.6.5: New USB device found, idVendor=0424, idProduct=274c, bcdDevice= 2.00 [ 247.613796] usb 3-1.6.5: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 247.613797] usb 3-1.6.5: Product: Hub Controller [ 247.613799] usb 3-1.6.5: Manufacturer: Microchip Tech [ 247.642290] input: USB Keyboard Consumer Control as /devices/pci0000:00/0000:00:1d.6/0000:06:00.0/0000:07:01.0/0000:09:00.0/0000:0a:04.0/0000:0c:00.0/0000:0d:01.0/0000:0e:00.0/usb3/3-1/3-1.6/3-1.6.2/3-1.6.2.4/3-1.6.2.4:1.1/0003:04D9:2013.0015/input/input46 [ 247.642466] hid-generic 0003:04D9:2013.0015: input,hidraw5: USB HID v1.00 Device [ USB Keyboard] on usb-0000:0e:00.0-1.6.2.4/input1 [ 247.703468] hid-generic 0003:0424:274C.0016: hiddev2,hidraw6: USB HID v1.10 Device [Microchip Tech Hub Controller] on usb-0000:0e:00.0-1.6.5/input0 [ 249.085573] xhci_hcd 0000:0e:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 6 comp_code 13 [ 249.085576] xhci_hcd 0000:0e:00.0: Looking for event-dma 00000000fffa2040 trb-start 00000000fffa2020 trb-end 00000000fffa2020 seg-start 00000000fffa2000 seg-end 00000000fffa2ff0 [ 249.086506] xhci_hcd 0000:0e:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 6 comp_code 13 [ 249.086509] xhci_hcd 0000:0e:00.0: Looking for event-dma 00000000fffa2050 trb-start 00000000fffa2020 trb-end 00000000fffa2020 seg-start 00000000fffa2000 seg-end 00000000fffa2ff0 [ 249.087505] xhci_hcd 0000:0e:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 6 comp_code 13 [ 249.087509] xhci_hcd 0000:0e:00.0: Looking for event-dma 00000000fffa2060 trb-start 00000000fffa2020 trb-end 00000000fffa2020 seg-start 00000000fffa2000 seg-end 00000000fffa2ff0 [ 249.088504] xhci_hcd 0000:0e:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 6 comp_code 13 [ 249.088506] xhci_hcd 0000:0e:00.0: Looking for event-dma 00000000fffa2070 trb-start 00000000fffa2020 trb-end 00000000fffa2020 seg-start 00000000fffa2000 seg-end 00000000fffa2ff0 [ 249.089505] xhci_hcd 0000:0e:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 6 comp_code 13 [ 249.089506] xhci_hcd 0000:0e:00.0: Looking for event-dma 00000000fffa2080 trb-start 00000000fffa2030 trb-end 00000000fffa2030 seg-start 00000000fffa2000 seg-end 00000000fffa2ff0 [ 249.090504] xhci_hcd 0000:0e:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 6 comp_code 13 [ 249.090507] xhci_hcd 0000:0e:00.0: Looking for event-dma 00000000fffa2090 trb-start 00000000fffa2030 trb-end 00000000fffa2030 seg-start 00000000fffa2000 seg-end 00000000fffa2ff0 [ 249.091507] xhci_hcd 0000:0e:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 6 comp_code 13 [ 249.091511] xhci_hcd 0000:0e:00.0: Looking for event-dma 00000000fffa20a0 trb-start 00000000fffa2030 trb-end 00000000fffa2030 seg-start 00000000fffa2000 seg-end 00000000fffa2ff0 [ 249.092507] xhci_hcd 0000:0e:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 6 comp_code 13 [ 249.092510] xhci_hcd 0000:0e:00.0: Looking for event-dma 00000000fffa20b0 trb-start 00000000fffa2030 trb-end 00000000fffa2030 seg-start 00000000fffa2000 seg-end 00000000fffa2ff0 [ 249.093505] xhci_hcd 0000:0e:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 6 comp_code 13 [ 249.093509] xhci_hcd 0000:0e:00.0: Looking for event-dma 00000000fffa20c0 trb-start 00000000fffa2030 trb-end 00000000fffa2030 seg-start 00000000fffa2000 seg-end 00000000fffa2ff0 [ 249.094507] xhci_hcd 0000:0e:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 6 comp_code 13 [ 249.094512] xhci_hcd 0000:0e:00.0: Looking for event-dma 00000000fffa20d0 trb-start 00000000fffa2030 trb-end 00000000fffa2030 seg-start 00000000fffa2000 seg-end 00000000fffa2ff0 [ 249.095507] xhci_hcd 0000:0e:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 6 comp_code 13 [ 249.095510] xhci_hcd 0000:0e:00.0: Looking for event-dma 00000000fffa20e0 trb-start 00000000fffa2030 trb-end 00000000fffa2030 seg-start 00000000fffa2000 seg-end 00000000fffa2ff0 [ 281.905693] usb 3-1.6.3: new full-speed USB device number 11 using xhci_hcd [ 282.165146] usb 3-1.6.3: New USB device found, idVendor=046d, idProduct=c52b, bcdDevice=12.07 [ 282.165149] usb 3-1.6.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 282.165150] usb 3-1.6.3: Product: USB Receiver [ 282.165151] usb 3-1.6.3: Manufacturer: Logitech [ 282.312085] logitech-djreceiver 0003:046D:C52B.0019: hiddev3,hidraw7: USB HID v1.11 Device [Logitech USB Receiver] on usb-0000:0e:00.0-1.6.3/input2 [ 282.508671] logitech-hidpp-device 0003:046D:402D.001A: HID++ 2.0 device connected. [ 283.632911] logitech-hidpp-device 0003:046D:402D.001A: multiplier = 8 [ 283.632980] input: Logitech Wireless Mouse M560 as /devices/pci0000:00/0000:00:1d.6/0000:06:00.0/0000:07:01.0/0000:09:00.0/0000:0a:04.0/0000:0c:00.0/0000:0d:01.0/0000:0e:00.0/usb3/3-1/3-1.6/3-1.6.3/3-1.6.3:1.2/0003:046D:C52B.0019/0003:046D:402D.001A/input/input47 [ 283.633345] logitech-hidpp-device 0003:046D:402D.001A: hidraw8: USB HID v1.11 Keyboard [Logitech M560] on usb-0000:0e:00.0-1.6.3/input2:1 ----8<---- The USB keyboard has a built-in hub into which the Logitech unified receiver is connected, and that receiver seems to be causing a lot of problems and delays during initialization.