Re: [gentoo-user] USB ports reset/restart

On 03/05/2018 07:33 PM, R0b0t1 wrote:
> On Mon, Mar 5, 2018 at 7:40 PM,  <thelma@×××××××××××.com> wrote:
>> Is there a way to reinitialize USB ports without restarting the computer?
>>
>> Two of my USB 3 ports stop working.
>>
>> lsusb -t
>> /:  Bus 11.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 5000M
>> /:  Bus 10.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 480M
>> /:  Bus 09.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 5000M
>> /:  Bus 08.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 480M
>> /:  Bus 07.Port 1: Dev 1, Class=root_hub, Driver=ohci-pci/4p, 12M
>> /:  Bus 06.Port 1: Dev 1, Class=root_hub, Driver=ohci-pci/2p, 12M
>> /:  Bus 05.Port 1: Dev 1, Class=root_hub, Driver=ohci-pci/5p, 12M
>>     |__ Port 3: Dev 13, If 0, Class=Human Interface Device,
>> Driver=usbhid, 12M
>> /:  Bus 04.Port 1: Dev 1, Class=root_hub, Driver=ohci-pci/5p, 12M
>>     |__ Port 4: Dev 2, If 0, Class=Human Interface Device,
>> Driver=usbhid, 12M
>>     |__ Port 4: Dev 2, If 1, Class=Human Interface Device,
>> Driver=usbhid, 12M
>>     |__ Port 4: Dev 2, If 2, Class=Human Interface Device,
>> Driver=usbhid, 12M
>> /:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/4p, 480M
>> /:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/5p, 480M
>> /:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/5p, 480M
>>
>
> How do you know they've stopped working? Are there notices in dmesg?
> Some devices do not work well on USB3 ports.
>
> Cheers,
>      R0b0t1

dmesg is not showing anything.
I have an usb extension cord pluged-in to the back of the computer "blue
usb port" (I think the color blue designates USB-3), there are two of
them.
My usb stick was working OK on one, but it stopped.  I pluged the USB
extension cord to the other port; so it was working for a while.  Now
the second one stop working as well.

When I connect my USB stick to the extension cable the "dmesg" is not
showing any output.

--
Thelma