[ 3600.383022] hub 2-0:1.0: unable to enumerate USB device on port 4
[ 3620.878959] usb 1-4: USB disconnect, address 2
[ 3620.878969] usb 1-4.1: USB disconnect, address 3
[ 3620.879528] usb 1-4.2: USB disconnect, address 4
[ 3620.900687] usb 1-4.4: USB disconnect, address 5
[ 3620.907038] FAT: bread failed in fat_clusters_flush
[ 3621.024172] FAT: bread failed in fat_clusters_flush
[ 3621.024229] FAT: bread failed in fat_clusters_flush
[ 3621.024255] FAT: bread failed in fat_clusters_flush
[ 6020.731920] line6usb driver version 0.8.1 (Debian 0.8.0+svn551-1+2.6.31-9.152)
[ 6020.732105] usbcore: registered new interface driver line6usb
[ 6223.569041] usb 1-4: new high speed USB device using ehci_hcd and address 6
[ 6223.691791] usb 1-4: configuration #1 chosen from 1 choice
[ 6223.692380] hub 1-4:1.0: USB hub found
[ 6223.692722] hub 1-4:1.0: 4 ports detected
[ 6223.962364] usb 1-4.1: new full speed USB device using ehci_hcd and address 7
[ 6224.050536] usb 1-4.1: configuration #1 chosen from 1 choice
[ 6224.117337] usb 1-4.2: new low speed USB device using ehci_hcd and address 8
[ 6224.201792] usb 1-4.2: configuration #1 chosen from 1 choice