On Wed, Feb 08, 2017 at 05:41:33PM +0100, Paul Menzel wrote:
> On 02/08/17 16:50, Johan Hovold wrote:
> > 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.
>
> No, I have not. Is this run-time configurable, or do I need to build the
> Linux kernel myself.
You'd need to rebuild the kernel.
> Also, I am unable to reproduce this problem with the *same* mice on a
> laptop with a USB3 – it’s blue – port.
Ok, then the quirk is probably not the right solution (even if it could
possibly help with the disconnects).
Johan
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