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Mise en veille/extinction USB 3-3-port4 cannot enable maybe the usb ca

Bonjour,
Je peux mettre le portable en veille une fois, ou l'éteindre proprement une fois. En revanche, si après l'avoir mis en veille une fois je réessaye de le mettre en veille, il se bloque pensant une ou deux minutes et ne fait rien. Et si je l'éteint, il refuse de s'éteindre et met le message d'erreur suivant en mode terminal :

USB 3-3-port4  cannot enable  maybe the usb cable is bad   shutdown

Je alors suis obligé de forcer l'extinction.

je travaille sur un Zbook HPk 14G2

cat /etc/issue
Ubuntu 16.04.5 LTS \n \l

:~$ lsusb -t
/:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 5000M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 5000M
    |__ Port 3: Dev 3, If 0, Class=Hub, Driver=hub/4p, 5000M
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/11p, 480M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
        |__ Port 2: Dev 4, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
    |__ Port 3: Dev 3, If 0, Class=Hub, Driver=hub/4p, 480M
    |__ Port 4: Dev 5, If 0, Class=Wireless, Driver=btusb, 12M
    |__ Port 4: Dev 5, If 1, Class=Wireless, Driver=btusb, 12M
    |__ Port 5: Dev 6, If 0, Class=Vendor Specific Class, Driver=, 12M
    |__ Port 7: Dev 7, If 0, Class=Video, Driver=uvcvideo, 480M
    |__ Port 7: Dev 7, If 1, Class=Video, Driver=uvcvideo, 480M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/3p, 480M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/8p, 480M

fred@BAPI-POHPEGF53:~$ sudo dmesg | grep "usb "
[sudo] Mot de passe de fred :
[    4.571456] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[    4.571458] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    4.571460] usb usb1: Product: EHCI Host Controller
[    4.571462] usb usb1: Manufacturer: Linux 4.4.0-141-generic ehci_hcd
[    4.571464] usb usb1: SerialNumber: 0000:00:1d.0
[    4.573018] usb usb2: New USB device found, idVendor=1d6b, idProduct=0002
[    4.573021] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    4.573023] usb usb2: Product: xHCI Host Controller
[    4.573025] usb usb2: Manufacturer: Linux 4.4.0-141-generic xhci-hcd
[    4.573026] usb usb2: SerialNumber: 0000:00:14.0
[    4.574091] usb usb3: New USB device found, idVendor=1d6b, idProduct=0003
[    4.574094] usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    4.574095] usb usb3: Product: xHCI Host Controller
[    4.574097] usb usb3: Manufacturer: Linux 4.4.0-141-generic xhci-hcd
[    4.574099] usb usb3: SerialNumber: 0000:00:14.0
[    4.883435] usb 2-1: new high-speed USB device number 2 using xhci_hcd
[    4.883444] usb 1-1: new high-speed USB device number 2 using ehci-pci
[    5.011623] usb 2-1: New USB device found, idVendor=0424, idProduct=5434
[    5.011626] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[    5.015804] usb 1-1: New USB device found, idVendor=8087, idProduct=8001
[    5.015807] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[    5.127463] usb 3-1: new SuperSpeed USB device number 2 using xhci_hcd
[    5.143828] usb 3-1: New USB device found, idVendor=0424, idProduct=5434
[    5.143831] usb 3-1: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[    5.143833] usb 3-1: Product: USB5534
[    5.143835] usb 3-1: Manufacturer: SMSC
[    5.143837] usb 3-1: SerialNumber: 1239567
[    5.259457] usb 2-3: new high-speed USB device number 3 using xhci_hcd
[    5.524131] usb 2-3: New USB device found, idVendor=0424, idProduct=2134
[    5.524134] usb 2-3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[    5.524136] usb 2-3: Product: USB2134B
[    5.524138] usb 2-3: Manufacturer: SMSC
[    5.635550] usb 3-3: new SuperSpeed USB device number 3 using xhci_hcd
[    5.652036] usb 3-3: New USB device found, idVendor=0424, idProduct=5534
[    5.652040] usb 3-3: New USB device strings: Mfr=2, Product=3, SerialNumber=0
[    5.652042] usb 3-3: Product: USB5534B
[    5.652044] usb 3-3: Manufacturer: SMSC
[    5.723492] usb 2-1.2: new low-speed USB device number 4 using xhci_hcd
[    5.815621] usb 2-1.2: New USB device found, idVendor=093a, idProduct=2510
[    5.815625] usb 2-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[    5.815627] usb 2-1.2: Product: USB Optical Mouse
[    5.815629] usb 2-1.2: Manufacturer: PixArt
[    5.815738] usb 2-1.2: ep 0x81 - rounding interval to 64 microframes, ep desc says 80 microframes
[    5.923539] usb 2-4: new full-speed USB device number 5 using xhci_hcd
[    6.056881] usb 2-4: New USB device found, idVendor=8087, idProduct=0a2a
[    6.056885] usb 2-4: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[    6.171553] usb 2-5: new full-speed USB device number 6 using xhci_hcd
[    6.300937] usb 2-5: New USB device found, idVendor=138a, idProduct=003f
[    6.300941] usb 2-5: New USB device strings: Mfr=0, Product=0, SerialNumber=1
[    6.300943] usb 2-5: SerialNumber: 003026175497
[    6.467545] usb 2-7: new high-speed USB device number 7 using xhci_hcd
[    6.650397] usb 2-7: New USB device found, idVendor=04f2, idProduct=b477
[    6.650401] usb 2-7: New USB device strings: Mfr=3, Product=1, SerialNumber=2
[    6.650413] usb 2-7: Product: HP HD Webcam
[    6.650415] usb 2-7: Manufacturer: Chicony Electronics Co.,Ltd.
[    6.650417] usb 2-7: SerialNumber: 200901010001

Merci
Cordialement
frederic