Oleg Bolshakov
02/09/2021 4:53 AM
post121250
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Hi Christian,
We have not faced of this issue before. To debug it we should reproduce the issue with specified HW.
Respectfully,
Oleg
> Hi Oleg,
>
> I have looked into the above issue again from our side after it had been
> observed again and I have a few findings that may be of interest:
>
> * It seems certain USB input devices are more likely to cause issues with the
> USB driver. For example, with a "Microsoft Intellimouse Optical USB Mouse" we
> can see that the 'usb' tool often reports input/output errors if executed
> while moving the mouse pointer. The same does not happen for other input
> devices, such as HP USB mouse or Kensington trackball.
>
> * It seems certain models of USB memory sticks are more likely than others to
> cause the entire USB driver to stop working as was mentioned in previous posts
> . For example, Sandisk Cruzer Blade drives appear to be more likely to cause
> these issues than other models. To provoke such issues, we have found that if
> you run the 'usb' command to check on USB device status while copying files to
> the USB drive it can easily cause input/output error for these Sandisk
> devices. And in some cases, the USB driver never fully recovers.
>
> * As mentioned earlier, it is generally enough to slay and re-start io-usb
> (and then associated drivers like devu-mouse) to get everything up and running
> again.
>
> Is there any additional information you can think of that we could try to
> collect to give you an even better picture of what's really going on?
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