dmesg is like this: [654525.720739] usb 6-2: new full speed USB device using uhci_hcd and address 41
[654540.830551] usb 6-2: device descriptor read/64, error -110
[654556.043363] usb 6-2: device descriptor read/64, error -110
[654556.259372] usb 6-2: new full speed USB device using uhci_hcd and address 42
[654561.670401] usb 6-2: device not accepting address 42, error -84
[654561.782591] usb 6-2: new full speed USB device using uhci_hcd and address 43
[654567.193324] usb 6-2: device not accepting address 43, error -84