lsusb -v :
Hub Descriptor:
bLength 9
bDescriptorType 41
nNbrPorts 2
wHubCharacteristic 0x000a
No power switching (usb 1.0)
Per-port overcurrent protection
bPwrOn2PwrGood 1 * 2 milli seconds
bHubContrCurrent 0 milli Ampere
DeviceRemovable 0x00
PortPwrCtrlMask 0xff
Hub Port Status:
Port 1: 0000.0303 lowspeed power enable connect
Port 2: 0000.0100 power
Device Status: 0x0003
Self Powered
Remote Wakeup Enabled
log kernel:
Jan 26 00:57:00 fred-laptop kernel: [21198.716000] hub 3-0:1.0: port 1 disabled
by hub (EMI?), re-enabling...
Jan 26 00:57:00 fred-laptop kernel: [21198.716000] usb 3-1: USB disconnect,
address 49
Jan 26 00:57:00 fred-laptop kernel: [21198.716000] usb 3-1.3: USB disconnect,
address 50
Jan 26 00:57:00 fred-laptop kernel: [21198.716000] usb 3-1.4: USB disconnect,
address 51
Jan 26 00:57:00 fred-laptop kernel: [21198.828000] usb 3-1: new full speed USB
device using uhci_hcd and address 52
Jan 26 00:57:00 fred-laptop kernel: [21198.980000] usb 3-1: configuration #1
chosen from 1 choice
Jan 26 00:57:00 fred-laptop kernel: [21198.984000] hub 3-1:1.0: USB hub found
Jan 26 00:57:00 fred-laptop kernel: [21198.988000] hub 3-1:1.0: 4 ports detected
Jan 26 00:57:01 fred-laptop kernel: [21199.316000] usb 3-1.3: new low speed USB
device using uhci_hcd and address 53
Jan 26 00:57:01 fred-laptop kernel: [21199.460000] usb 3-1.3: configuration #1
chosen from 1 choice
Jan 26 00:57:01 fred-laptop kernel: [21199.480000] input: PS/2+USB Mouse as
/class/input/input67
Jan 26 00:57:01 fred-laptop kernel: [21199.480000] input: USB HID v1.00 Mouse
[PS/2+USB Mouse] on usb-0000:00:1d.2-1.3
Jan 26 00:57:01 fred-laptop kernel: [21199.700000] usb 3-1.4: new low speed USB
device using uhci_hcd and address 54
Jan 26 00:57:01 fred-laptop kernel: [21199.852000] usb 3-1.4: configuration #1
chosen from 1 choice
Jan 26 00:57:01 fred-laptop kernel: [21199.876000] input: HID Keyboard Device
as /class/input/input68
Jan 26 00:57:01 fred-laptop kernel: [21199.876000] input: USB HID v1.10
Keyboard [HID Keyboard Device] on usb-0000:00:1d.2-1.4
Jan 26 00:57:01 fred-laptop kernel: [21199.908000] input: HID Keyboard Device
as /class/input/input69
Jan 26 00:57:01 fred-laptop kernel: [21199.908000] input: USB HID v1.10 Device
[HID Keyboard Device] on usb-0000:00:1d.2-1.4
my hub: http://www.priceminister.com/offer/buy/18811182/Mini-Hub-4
-Ports-USB-2-HIGH-SPEED-Concentrateur-de-reseau-commutateur.html
--
impossible to use my usb hub
https://bugs.launchpad.net/bugs/213460
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