What do these messages in syslog mean (stops my trackball working)?

[Chris Green]

On Sat, Oct 12, 2013 at 11:21:08AM +0100, Colin Law wrote:
> > I originally saw the fault when I used the trackball from my desktop
> > machine on the laptop, so both trackballs do it on the laptop and
> > neither does on the desktop.
> >
> > The trackball will work again if I plug the 'dongle' into the other port
> > on the laptop but it fails again after a similar random period and then
> > the only way to restore working is to reboot.
> 
> It could be the hardware on the laptop of course.  Do you have other
> usb equipment you could try on it? Alternatively if the laptop is new
> I wonder whether the usb hardware is not fully supported by the 12.10
> kernel. It would interesting to try running it on the Saucy live image
> to see if it fails then.  If it runs for hours before failing (on
> 12.10) then that could be tricky.
> 
I've not noticed any other issues with USB on the laptop but I don't
often connect USB devices to it, just occasionally a Kindle but that's
just to recharge it really.

I've just upgraded the laptop to 13.04 so I'll see if that makes any
difference.

It sometimes runs for only a few minutes, other times for an hour or
two.

-- 
Chris Green