Voici ce qu'il y a dans dmesg (au début c'est là ou ça a planté puis à un moment je débranche puis je rebranche)
[19359.401398] usb 1-7: reset high-speed USB device number 6 using xhci_hcd
[19364.776944] usb 1-7: device descriptor read/64, error -110
[19380.392870] usb 1-7: device descriptor read/64, error -110
[19380.628904] usb 1-7: reset high-speed USB device number 6 using xhci_hcd
[19385.772876] usb 1-7: device descriptor read/64, error -110
[19401.384887] usb 1-7: device descriptor read/64, error -110
[19401.624810] usb 1-7: reset high-speed USB device number 6 using xhci_hcd
[19406.632982] xhci_hcd 0000:00:14.0: Timeout while waiting for setup device command
[19406.840899] usb 1-7: Device not responding to setup address.
[19407.048717] usb 1-7: device not accepting address 6, error -71
[19407.176754] usb 1-7: reset high-speed USB device number 6 using xhci_hcd
[19412.264770] xhci_hcd 0000:00:14.0: Timeout while waiting for setup device command
[19412.472855] usb 1-7: Device not responding to setup address.
[19412.680687] usb 1-7: device not accepting address 6, error -71
[19412.680781] usb 1-7: USB disconnect, device number 6
[19412.856729] usb 1-7: new high-speed USB device number 7 using xhci_hcd
[19418.024721] usb 1-7: device descriptor read/64, error -110
[19433.640688] usb 1-7: device descriptor read/64, error -110
[19433.876638] usb 1-7: new high-speed USB device number 8 using xhci_hcd
[19439.016701] usb 1-7: device descriptor read/64, error -110
[19454.632623] usb 1-7: device descriptor read/64, error -110
[19454.740605] usb usb1-port7: attempt power cycle
[19455.392542] usb 1-7: new high-speed USB device number 9 using xhci_hcd
[19460.648557] xhci_hcd 0000:00:14.0: Timeout while waiting for setup device command
[19460.856631] usb 1-7: Device not responding to setup address.
[19461.064502] usb 1-7: device not accepting address 9, error -71
[19461.192504] usb 1-7: new high-speed USB device number 10 using xhci_hcd
[19466.280526] xhci_hcd 0000:00:14.0: Timeout while waiting for setup device command
[19466.488611] usb 1-7: Device not responding to setup address.
[19466.696475] usb 1-7: device not accepting address 10, error -71
[19466.696582] usb usb1-port7: unable to enumerate USB device
[19563.332031] usb 1-7: new high-speed USB device number 11 using xhci_hcd
[19563.481196] usb 1-7: New USB device found, idVendor=18d1, idProduct=0002, bcdDevice= 1.00
[19563.481201] usb 1-7: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[19563.481204] usb 1-7: Product: HD Web Camera
[19563.481207] usb 1-7: Manufacturer: Ingenic Semiconductor CO., LTD.
[19563.481210] usb 1-7: SerialNumber: Ucamera001
[19563.488049] uvcvideo: Found UVC 1.00 device HD Web Camera (18d1:0002)
[19564.008124] uvcvideo: Failed to query (GET_INFO) UVC control 2 on unit 1: -110 (exp. 1).
[19564.384883] uvcvideo: Failed to query (GET_INFO) UVC control 7 on unit 2: -32 (exp. 1).
[19564.504294] uvcvideo: Failed to query (GET_INFO) UVC control 8 on unit 2: -71 (exp. 1).
[19564.504410] uvcvideo: Failed to query (GET_INFO) UVC control 9 on unit 2: -71 (exp. 1).
[19564.504454] uvcvideo: Failed to query (GET_INFO) UVC control 10 on unit 2: -71 (exp. 1).
[19564.504575] uvcvideo: Failed to query (GET_INFO) UVC control 1 on unit 2: -71 (exp. 1).
[19564.504619] uvcvideo: Failed to query (GET_INFO) UVC control 4 on unit 2: -71 (exp. 1).
[19564.504691] uvcvideo: Failed to query (GET_INFO) UVC control 5 on unit 2: -71 (exp. 1).
[19564.504768] uvcvideo: Failed to query (GET_INFO) UVC control 11 on unit 2: -71 (exp. 1).
[19564.504927] uvcvideo: UVC non compliance - GET_DEF(PROBE) not supported. Enabling workaround.
[19564.505008] uvcvideo: Failed to query (129) UVC probe control : -71 (exp. 26).
[19564.505011] uvcvideo: Failed to initialize the device (-5).
[19564.506319] usb 1-7: 3:1: cannot set freq 16000 to ep 0x83
[19564.507162] usb 1-7: 6:2: cannot get min/max values for control 2 (id 6)
[19564.507830] usb 1-7: USB disconnect, device number 11
[19564.816059] usb 1-7: new high-speed USB device number 12 using xhci_hcd
[19564.965025] usb 1-7: New USB device found, idVendor=18d1, idProduct=0002, bcdDevice= 1.00
[19564.965031] usb 1-7: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[19564.965034] usb 1-7: Product: HD Web Camera
[19564.965037] usb 1-7: Manufacturer: Ingenic Semiconductor CO., LTD.
[19564.965040] usb 1-7: SerialNumber: Ucamera001
[19564.972089] uvcvideo: Found UVC 1.00 device HD Web Camera (18d1:0002)
[19564.992728] uvcvideo: Failed to query (GET_INFO) UVC control 6 on unit 2: -32 (exp. 1).
[19565.013777] uvcvideo: Failed to query (GET_INFO) UVC control 9 on unit 2: -32 (exp. 1).
[19565.034851] uvcvideo: Failed to query (GET_INFO) UVC control 4 on unit 2: -32 (exp. 1).
[19565.050689] uvcvideo: Failed to query (GET_INFO) UVC control 11 on unit 2: -32 (exp. 1).
[19565.077788] input: HD Web Camera: HD Web Camera as /devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.0/input/input23
[19565.080928] usb 1-7: Warning! Unlikely big volume range (=3072), cval->res is probably wrong.
[19565.080934] usb 1-7: [6] FU [Mic Capture Volume] ch = 1, val = -1536/1536/1
[19565.678936] uvcvideo: Failed to query (GET_DEF) UVC control 6 on unit 2: -32 (exp. 2).
[19569.544151] uvcvideo: Failed to query (GET_DEF) UVC control 6 on unit 2: -32 (exp. 2).
[19630.608999] st: Version 20160209, fixed bufsize 32768, s/g segs 256
[19651.239080] parport0: PC-style at 0x378 (0x778) [PCSPP,TRISTATE,EPP]
[19651.239732] parport0: irq 7 detected
[19651.358797] lp0: using parport0 (polling).
[19651.483508] parport0: PC-style at 0x378 (0x778) [PCSPP,TRISTATE,EPP]
[19651.484214] parport0: irq 7 detected
[19651.602002] lp0: using parport0 (polling).
[19652.349661] parport0: PC-style at 0x378 (0x778) [PCSPP,TRISTATE,EPP]
[19652.350323] parport0: irq 7 detected
[19652.462407] lp0: using parport0 (polling).
[19652.589183] ppa: Version 2.07 (for Linux 2.4.x)