Impossible de connecter mon téléphone

Bonjour,

J'essaye sans succès de brancher mon téléphone sur mon PC, mais impossible de ne serait-ce que lui demander de le recharger. Voilà ce que me donne dmesg après plusieurs tentatives:

[11135.932486] usb 1-2: new full-speed USB device number 5 using xhci_hcd
[11136.044343] usb 1-2: device descriptor read/64, error -71
[11136.260364] usb 1-2: device descriptor read/64, error -71
[11136.476468] usb 1-2: new full-speed USB device number 6 using xhci_hcd
[11136.588306] usb 1-2: device descriptor read/64, error -71
[11136.804352] usb 1-2: device descriptor read/64, error -71
[11136.908319] usb usb1-port2: attempt power cycle
[11137.532346] usb 1-2: new full-speed USB device number 7 using xhci_hcd
[11137.532518] usb 1-2: Device not responding to setup address.
[11137.736676] usb 1-2: Device not responding to setup address.
[11137.940495] usb 1-2: device not accepting address 7, error -71
[11138.052483] usb 1-2: new full-speed USB device number 8 using xhci_hcd
[11138.052747] usb 1-2: Device not responding to setup address.
[11138.256761] usb 1-2: Device not responding to setup address.
[11138.460506] usb 1-2: device not accepting address 8, error -71
[11138.460574] usb usb1-port2: unable to enumerate USB device
[11155.404657] usb 1-2: new full-speed USB device number 9 using xhci_hcd
[11155.516687] usb 1-2: device descriptor read/64, error -71
[11155.732628] usb 1-2: device descriptor read/64, error -71
[11155.948504] usb 1-2: new full-speed USB device number 10 using xhci_hcd
[11156.060692] usb 1-2: device descriptor read/64, error -71
[11156.276523] usb 1-2: device descriptor read/64, error -71
[11156.380702] usb usb1-port2: attempt power cycle
[11157.004674] usb 1-2: new full-speed USB device number 11 using xhci_hcd
[11157.004935] usb 1-2: Device not responding to setup address.
[11157.208934] usb 1-2: Device not responding to setup address.
[11157.412647] usb 1-2: device not accepting address 11, error -71
[11157.524679] usb 1-2: new full-speed USB device number 12 using xhci_hcd
[11157.524937] usb 1-2: Device not responding to setup address.
[11157.728928] usb 1-2: Device not responding to setup address.
[11157.932515] usb 1-2: device not accepting address 12, error -71
[11157.932578] usb usb1-port2: unable to enumerate USB device
[11211.305144] usb 1-1: new full-speed USB device number 13 using xhci_hcd
[11211.417180] usb 1-1: device descriptor read/64, error -71
[11211.633182] usb 1-1: device descriptor read/64, error -71
[11211.849158] usb 1-1: new full-speed USB device number 14 using xhci_hcd
[11211.961197] usb 1-1: device descriptor read/64, error -71
[11212.177028] usb 1-1: device descriptor read/64, error -71
[11212.281195] usb usb1-port1: attempt power cycle
[11212.905013] usb 1-1: new full-speed USB device number 15 using xhci_hcd
[11212.905142] usb 1-1: Device not responding to setup address.
[11213.109422] usb 1-1: Device not responding to setup address.
[11213.312977] usb 1-1: device not accepting address 15, error -71
[11213.425130] usb 1-1: new full-speed USB device number 16 using xhci_hcd
[11213.425392] usb 1-1: Device not responding to setup address.
[11213.629423] usb 1-1: Device not responding to setup address.
[11213.833172] usb 1-1: device not accepting address 16, error -71
[11213.833240] usb usb1-port1: unable to enumerate USB device