On Wed, Feb 08, 2017 at 04:15:02PM +0100, Paul Menzel wrote:
> On 02/08/17 14:02, Greg KH wrote:
> > On Wed, Feb 08, 2017 at 12:16:44PM +0100, Paul Menzel wrote:
> >> On the server Dell PowerEdge R730 with firmware 2.3.4, and Linux 4.9.2, the
> >> connected USB mouse disconnects and connects again periodically. This can be
> >> reproduced with two different (Logitech) mice.
> >>
> >> ```
> >> $ more /proc/version
> >> Linux version 4.9.0-1-amd64 (debian-kernel@xxxxxxxxxxxxxxxx) (gcc version
> >> 6.3.0 20161229 (Debian 6.3.0-2) ) #1 SMP Debian 4.9.2-2 (2017-01-12)
> >> $ journalctl -o short-precise -k -f
> >> […]
> >> Feb 08 12:00:16.193817 poweredger730 kernel: usb 3-2: USB disconnect, device
> >> number 84
> >
> > Looks like a hardware issue, the kernel can not cause a device to
> > disconnect itself.
> >
> > Especially as this happens with two different mice, you might want to
> > see if there's something wrong with that port.
>
> With three devices of the Logitech model 046d:c077 (Logitech, Inc. M105
> Optical Mouse) the problem could be reproduced on each USB port.
Have you tried enabling the always-poll HID-quirk, which is needed for
certain devices to prevent issues like this?
See commit bfe3c873e978 ("HID: usbhid: enable always-poll quirk for Elan
Touchscreen") for an example.
Johan
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