Hi Same problem here with 3.10.3. Dmesg filtered with 'hci'. [ 0.859731] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver [ 0.860187] ahci 0000:00:11.0: version 3.0 [ 0.860364] ehci-pci: EHCI PCI platform driver [ 0.860416] ahci 0000:00:11.0: AHCI 0001.0100 32 slots 6 ports 3 Gbps 0x3f impl SATA mode [ 0.860420] ahci 0000:00:11.0: flags: 64bit ncq sntf ilck pm led clo pmp pio slum part ccc [ 0.860750] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver [ 0.861212] xhci_hcd 0000:02:00.0: xHCI Host Controller [ 0.861220] xhci_hcd 0000:02:00.0: new USB bus registered, assigned bus number 1 [ 0.861430] xhci_hcd 0000:02:00.0: irq 43 for MSI/MSI-X [ 0.861435] xhci_hcd 0000:02:00.0: irq 44 for MSI/MSI-X [ 0.861440] xhci_hcd 0000:02:00.0: irq 45 for MSI/MSI-X [ 0.861446] xhci_hcd 0000:02:00.0: irq 46 for MSI/MSI-X [ 0.861451] xhci_hcd 0000:02:00.0: irq 47 for MSI/MSI-X [ 0.861485] scsi0 : ahci [ 0.861843] xHCI xhci_add_endpoint called for root hub [ 0.861845] xHCI xhci_check_bandwidth called for root hub [ 0.861980] xhci_hcd 0000:02:00.0: xHCI Host Controller [ 0.861984] xhci_hcd 0000:02:00.0: new USB bus registered, assigned bus number 2 [ 0.862080] xHCI xhci_add_endpoint called for root hub [ 0.862081] xHCI xhci_check_bandwidth called for root hub [ 0.864531] scsi1 : ahci [ 0.864811] scsi2 : ahci [ 0.864996] scsi3 : ahci [ 0.865140] scsi4 : ahci [ 0.865411] scsi5 : ahci [ 0.865651] ehci-pci 0000:00:12.2: EHCI Host Controller [ 0.865657] ehci-pci 0000:00:12.2: new USB bus registered, assigned bus number 3 [ 0.865665] ehci-pci 0000:00:12.2: applying AMD SB700/SB800/Hudson-2/3 EHCI dummy qh workaround [ 0.865667] ehci-pci 0000:00:12.2: applying AMD SB600/SB700 USB freeze workaround [ 0.865681] ehci-pci 0000:00:12.2: debug port 1 [ 0.867822] ehci-pci 0000:00:12.2: irq 17, io mem 0xfe7ff000 [ 0.871155] firewire_ohci 0000:04:08.0: added OHCI v1.0 device as card 0, 8 IR + 8 IT contexts, quirks 0x80 [ 0.878046] ehci-pci 0000:00:12.2: USB 2.0 started, EHCI 1.00 [ 0.878389] ehci-pci 0000:00:13.2: EHCI Host Controller [ 0.878394] ehci-pci 0000:00:13.2: new USB bus registered, assigned bus number 4 [ 0.878397] ehci-pci 0000:00:13.2: applying AMD SB700/SB800/Hudson-2/3 EHCI dummy qh workaround [ 0.878399] ehci-pci 0000:00:13.2: applying AMD SB600/SB700 USB freeze workaround [ 0.878412] ehci-pci 0000:00:13.2: debug port 1 [ 0.878490] ehci-pci 0000:00:13.2: irq 19, io mem 0xfe7fa800 [ 0.888004] ehci-pci 0000:00:13.2: USB 2.0 started, EHCI 1.00 [ 0.889495] ohci_hcd 0000:00:12.0: OHCI Host Controller [ 0.889501] ohci_hcd 0000:00:12.0: new USB bus registered, assigned bus number 5 [ 0.889583] ohci_hcd 0000:00:12.0: irq 16, io mem 0xfe7fe000 [ 0.945467] ohci_hcd 0000:00:12.1: OHCI Host Controller [ 0.945472] ohci_hcd 0000:00:12.1: new USB bus registered, assigned bus number 6 [ 0.945520] ohci_hcd 0000:00:12.1: irq 16, io mem 0xfe7fd000 [ 1.001897] ohci_hcd 0000:00:13.0: OHCI Host Controller [ 1.001902] ohci_hcd 0000:00:13.0: new USB bus registered, assigned bus number 7 [ 1.001957] ohci_hcd 0000:00:13.0: irq 18, io mem 0xfe7fc000 [ 1.058326] ohci_hcd 0000:00:13.1: OHCI Host Controller [ 1.058331] ohci_hcd 0000:00:13.1: new USB bus registered, assigned bus number 8 [ 1.058374] ohci_hcd 0000:00:13.1: irq 18, io mem 0xfe7fb000 [ 1.114785] ohci_hcd 0000:00:14.5: OHCI Host Controller [ 1.114792] ohci_hcd 0000:00:14.5: new USB bus registered, assigned bus number 9 [ 1.114840] ohci_hcd 0000:00:14.5: irq 18, io mem 0xfe7f9000 [ 1.170019] usb 1-3: new full-speed USB device number 2 using xhci_hcd [ 1.811497] usb 2-1: new SuperSpeed USB device number 2 using xhci_hcd [ 1.941280] usb 2-4: new SuperSpeed USB device number 3 using xhci_hcd [ 2.067622] usb 4-3: new high-speed USB device number 2 using ehci-pci [ 2.303691] usb 4-5: new high-speed USB device number 3 using ehci-pci [ 2.680087] usb 6-3: new full-speed USB device number 2 using ohci_hcd [ 3.269020] usb 5-3: new low-speed USB device number 2 using ohci_hcd [ 4.817218] usb 4-3.2: new full-speed USB device number 4 using ehci-pci [ 7.144667] usb 4-3.5: new full-speed USB device number 5 using ehci-pci [ 7.580122] usb 4-3.7: new full-speed USB device number 6 using ehci-pci [ 8.972148] usb 4-3.5: new full-speed USB device number 7 using ehci-pci [ 34.533594] usb 2-1: reset SuperSpeed USB device number 2 using xhci_hcd [ 34.550518] xhci_hcd 0000:02:00.0: xHCI xhci_drop_endpoint called with disabled ep ffff88022293bf80 [ 34.550527] xhci_hcd 0000:02:00.0: xHCI xhci_drop_endpoint called with disabled ep ffff88022293bfc0 [ 65.557526] usb 2-1: reset SuperSpeed USB device number 2 using xhci_hcd [ 65.574161] xhci_hcd 0000:02:00.0: xHCI xhci_drop_endpoint called with disabled ep ffff88022293bf80 [ 65.574169] xhci_hcd 0000:02:00.0: xHCI xhci_drop_endpoint called with disabled ep ffff88022293bfc0 [ 96.448508] usb 2-1: reset SuperSpeed USB device number 2 using xhci_hcd [ 96.464969] xhci_hcd 0000:02:00.0: xHCI xhci_drop_endpoint called with disabled ep ffff88022293bf80 [ 96.464978] xhci_hcd 0000:02:00.0: xHCI xhci_drop_endpoint called with disabled ep ffff88022293bfc0 [ 127.445926] usb 2-1: reset SuperSpeed USB device number 2 using xhci_hcd [ 127.462362] xhci_hcd 0000:02:00.0: xHCI xhci_drop_endpoint called with disabled ep ffff88022293bf80 [ 127.462370] xhci_hcd 0000:02:00.0: xHCI xhci_drop_endpoint called with disabled ep ffff88022293bfc0 [ 158.336889] usb 2-1: reset SuperSpeed USB device number 2 using xhci_hcd [ 158.414247] xhci_hcd 0000:02:00.0: xHCI xhci_drop_endpoint called with disabled ep ffff88022293bf80 [ 158.414249] xhci_hcd 0000:02:00.0: xHCI xhci_drop_endpoint called with disabled ep ffff88022293bfc0 Thanks, Ed Tomlinson -- 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