On Mon, 2016-09-05 at 14:01 +0300, Dmitry Gutov wrote:
> On 05.09.2016 13:42, Oliver Neukum wrote:
>
> > This very much looks like power saving misbehaving.
>
> It does. But it doesn't seem like my distro enables autosuspend there by
> default.
>
> > Are you using autosuspend on this device?
>
> $ lsusb
> ...
> Bus 002 Device 002: ID 357d:7788 Sharkoon QuickPort XT
> ...
>
> $ cat /sys/bus/usb/devices/usb2/2-1/power/control
> on
>
> $ cat /sys/bus/usb/devices/usb2/2-2/power/control
> on
OK
>
> > Have you tried the RESET_RESUME quirk on the USB
> > level?
>
> How do I do that?
You add the device to the kernel quirks list. But if
you don't use autosuspend, the point is moot.
Do you use LPM, as described in
Documentation/usb/power-management.txt
?
Regards
Oliver
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