Bonjour Moko138
merci pour ton aide.
voici le résultat :
alain@cinnamon ~ $ dmesg | tail -1 > ~/tail.txt ; sleep 45 && echo ; mount -l | tail -1 ; echo ; lsusb ; echo ; lsusb -t ; echo ; dmesg | grep -A1000 "$(sed -r 's/([].[])/\\\1/g' ~/tail.txt)" | grep -Evi "80211|associate|authenticat|dhclient|dhcp|forcedeth|ipv6|link is not ready|network|no link during initialization|phy0|tx status|ufw|wlan"; echo; ls -la /media ; echo ; ls -la /media/$USER; echo
gvfsd-fuse on /run/user/1000/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,relatime,user_id=1000,group_id=1000)
Bus 002 Device 004: ID 046d:0825 Logitech, Inc. Webcam C270
Bus 002 Device 003: ID 1532:001c Razer USA, Ltd RZ01-0036 Optical Gaming Mouse [Abyssus]
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
/: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 5000M
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 480M
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/8p, 480M
|__ Port 4: Dev 3, If 0, Class=Human Interface Device, Driver=usbhid, 12M
|__ Port 6: Dev 4, If 0, Class=Video, Driver=uvcvideo, 480M
|__ Port 6: Dev 4, If 1, Class=Video, Driver=uvcvideo, 480M
|__ Port 6: Dev 4, If 2, Class=Audio, Driver=snd-usb-audio, 480M
|__ Port 6: Dev 4, If 3, Class=Audio, Driver=snd-usb-audio, 480M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/6p, 480M
[ 36.632022] usb 2-1.6: reset high-speed USB device number 4 using ehci-pci
[ 150.492435] usb 1-1.1: new full-speed USB device number 3 using ehci-pci
[ 150.576434] usb 1-1.1: device descriptor read/64, error -32
[ 150.764439] usb 1-1.1: device descriptor read/64, error -32
[ 150.952440] usb 1-1.1: new full-speed USB device number 4 using ehci-pci
[ 151.032444] usb 1-1.1: device descriptor read/64, error -32
[ 151.220444] usb 1-1.1: device descriptor read/64, error -32
[ 151.328672] usb 1-1-port1: attempt power cycle
[ 151.932456] usb 1-1.1: new full-speed USB device number 5 using ehci-pci
[ 152.348461] usb 1-1.1: device not accepting address 5, error -32
[ 152.428458] usb 1-1.1: new full-speed USB device number 6 using ehci-pci
[ 152.844469] usb 1-1.1: device not accepting address 6, error -32
[ 152.844625] usb 1-1-port1: unable to enumerate USB device
total 12
drwxr-xr-x 3 root root 4096 fév 10 2018 .
drwxr-xr-x 23 root root 4096 nov 1 09:04 ..
drwxr-x---+ 2 root root 4096 nov 6 16:17 alain
total 8
drwxr-x---+ 2 root root 4096 nov 6 16:17 .
drwxr-xr-x 3 root root 4096 fév 10 2018 ..
alain@cinnamon ~ $
oups, effectivement j'avais oublié une ligne.
j'ai mon imprimante qui est sur un USB.