atos@atos-LIFEBOOK-A512:~$ dmesg -L | tail
[  887.079554] usb 2-1.1: new high-speed USB device number 22 using ehci-pci
[  887.109086] usb 2-1.1: device descriptor read/8, error -61
[  887.237065] usb 2-1.1: device descriptor read/8, error -61
[  887.427549] usb 2-1.1: new high-speed USB device number 23 using ehci-pci
[  887.457359] usb 2-1.1: device descriptor read/8, error -61
[  887.585108] usb 2-1.1: device descriptor read/8, error -61
[  887.691654] usb 2-1-port1: unable to enumerate USB device