Hi, The bugreport on Bugzilla is Bug 70361: https://bugzilla.kernel.org/show_bug.cgi?id=70361 I have a Thinkpad OneLink dock, which is a USB dock and has a USB 3.0 hub, a USB 2.0 hub, and ax88179 ethernet. This dock's USB 3.0 hub is disconnected for no reason. This occurs even when the ethernet cable is pulled out from the dock. The port in the following is Bus02-Port 3. $ lsusb -t /: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/3p, 480M |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/8p, 480M |__ Port 7: Dev 3, If 0, Class=Human Interface Device, Driver=usbhid, 12M |__ Port 8: Dev 4, If 0, Class=Human Interface Device, Driver=wacom, 12M /: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 5000M |__ Port 3: Dev 38, If 0, Class=Hub, Driver=hub/4p, 5000M |__ Port 1: Dev 39, If 0, Class=Vendor Specific Class, Driver=ax88179_178a, 5000M /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/9p, 480M |__ Port 3: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M |__ Port 2: Dev 6, If 0, Class=Hub, Driver=hub/4p, 480M |__ Port 1: Dev 7, If 0, Class=Audio, Driver=snd-usb-audio, 12M |__ Port 1: Dev 7, If 1, Class=Audio, Driver=snd-usb-audio, 12M |__ Port 1: Dev 7, If 2, Class=Audio, Driver=snd-usb-audio, 12M |__ Port 1: Dev 7, If 3, Class=Human Interface Device, Driver=usbhid, 12M |__ Port 3: Dev 8, If 0, Class=Hub, Driver=hub/4p, 480M |__ Port 2: Dev 9, If 0, Class=Hub, Driver=hub/3p, 480M |__ Port 1: Dev 10, If 0, Class=Human Interface Device, Driver=usbhid, 12M |__ Port 4: Dev 17, If 0, Class=Wireless, Driver=btusb, 12M |__ Port 4: Dev 17, If 1, Class=Wireless, Driver=btusb, 12M |__ Port 5: Dev 4, If 0, Class=Human Interface Device, Driver=usbhid, 12M |__ Port 6: Dev 5, If 0, Class=Video, Driver=uvcvideo, 480M |__ Port 6: Dev 5, If 1, Class=Video, Driver=uvcvideo, 480M Part of dmesg output: [ +3.072696] xhci_hcd 0000:00:14.0: ep 0x82 - asked for 26624 bytes, 26392 bytes untransferred [ +2.970278] xhci_hcd 0000:00:14.0: ep 0x82 - asked for 26624 bytes, 26392 bytes untransferred [ +3.072701] xhci_hcd 0000:00:14.0: ep 0x82 - asked for 26624 bytes, 26392 bytes untransferred [ +3.072771] xhci_hcd 0000:00:14.0: ep 0x82 - asked for 26624 bytes, 26392 bytes untransferred [ +2.970205] xhci_hcd 0000:00:14.0: ep 0x82 - asked for 26624 bytes, 26392 bytes untransferred [ +3.072695] xhci_hcd 0000:00:14.0: ep 0x82 - asked for 26624 bytes, 26392 bytes untransferred [ +1.739580] xhci_hcd 0000:00:14.0: Port Status Change Event for port 12 [ +0.000012] xhci_hcd 0000:00:14.0: handle_port_status: starting port polling. [ +0.000084] hub 2-0:1.0: state 7 ports 4 chg 0000 evt 0008 [ +0.000023] xhci_hcd 0000:00:14.0: get port status, actual port 2 status = 0x4202c0 [ +0.000005] xhci_hcd 0000:00:14.0: Get port status returned 0x4102c0 [ +0.000078] xhci_hcd 0000:00:14.0: clear port connect change, actual port 2 status = 0x4002c0 [ +0.000065] xhci_hcd 0000:00:14.0: clear port link state change, actual port 2 status = 0x2c0 [ +0.000034] hub 2-0:1.0: warm reset port 3 [ +0.021287] xhci_hcd 0000:00:14.0: xhci_hub_status_data: stopping port polling. [ +0.029993] xhci_hcd 0000:00:14.0: get port status, actual port 2 status = 0x2d0 [ +0.000009] xhci_hcd 0000:00:14.0: Get port status returned 0x2d0 [ +0.000068] hub 2-0:1.0: port 3 not warm reset yet, waiting 50ms [ +0.052983] xhci_hcd 0000:00:14.0: Port Status Change Event for port 12 [ +0.000012] xhci_hcd 0000:00:14.0: handle_port_status: starting port polling. [ +0.000315] xhci_hcd 0000:00:14.0: get port status, actual port 2 status = 0x2a1203 [ +0.000019] xhci_hcd 0000:00:14.0: Get port status returned 0x310203 [ +0.053395] xhci_hcd 0000:00:14.0: clear port reset change, actual port 2 status = 0xa1203 [ +0.000082] xhci_hcd 0000:00:14.0: clear port warm(BH) reset change, actual port 2 status = 0x21203 [ +0.000072] xhci_hcd 0000:00:14.0: clear port link state change, actual port 2 status = 0x21203 [ +0.000072] xhci_hcd 0000:00:14.0: clear port connect change, actual port 2 status = 0x1203 [ +0.000072] xhci_hcd 0000:00:14.0: get port status, actual port 2 status = 0x1203 [ +0.000008] xhci_hcd 0000:00:14.0: Get port status returned 0x203 [ +0.000065] hub 2-0:1.0: port 3, status 02c0, change 0041, 5.0 Gb/s [ +0.000012] usb 2-3: USB disconnect, device number 36 [ +0.000006] usb 2-3.1: USB disconnect, device number 37 [ +0.000004] usb 2-3.1: unregistering device [ +0.000005] usb 2-3.1: unregistering interface 2-3.1:1.0 [ +0.000160] usb 2-3.1: Failed to set U1 timeout to 0x0,error code -19 [ +0.000007] usb 2-3.1: Hub-initiated U1 disabled at request of driver ax88179_178a [ +0.000005] usb 2-3.1: Failed to set U1 timeout to 0xff,error code -19 [ +0.000005] usb 2-3.1: Hub-initiated U2 disabled at request of driver ax88179_178a [ +0.000004] usb 2-3.1: Failed to set U2 timeout to 0xff,error code -19 [ +0.000006] xhci_hcd 0000:00:14.0: Set up evaluate context for LPM MEL change. [ +0.000004] xhci_hcd 0000:00:14.0: Slot 30 Input Context: [ +0.000006] xhci_hcd 0000:00:14.0: @ffff8802129c4000 (virt) @2129c4000 (dma) 0x000000 - drop flags [ +0.000004] xhci_hcd 0000:00:14.0: @ffff8802129c4004 (virt) @2129c4004 (dma) 0x000001 - add flags [ +0.000005] xhci_hcd 0000:00:14.0: @ffff8802129c4008 (virt) @2129c4008 (dma) 0x000000 - rsvd2[0] [ +0.000004] xhci_hcd 0000:00:14.0: @ffff8802129c400c (virt) @2129c400c (dma) 0x000000 - rsvd2[1] [ +0.000004] xhci_hcd 0000:00:14.0: @ffff8802129c4010 (virt) @2129c4010 (dma) 0x000000 - rsvd2[2] [ +0.000004] xhci_hcd 0000:00:14.0: @ffff8802129c4014 (virt) @2129c4014 (dma) 0x000000 - rsvd2[3] Regards, Taegil -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
