Have you checked the log files e.g. /var/log/messages to see if it indicates that the USB devices get unplugged or anything similar when you cannot input anything?
On 7 Apr 2013, at 15:46, norman silverstone <nor...@littletank.org> wrote: > < very big snip > > > I have just booted the PC for the first time in 24 hours running Ubuntu 12.04 > and the keyboard and mouse buttons behave as they should. CPU activity is > very low and there is no swap activity. I will leave the machine running to > see what happens. > > Do gremlins still exist?? > > Norman > > -- > ubuntu-uk@lists.ubuntu.com > https://lists.ubuntu.com/mailman/listinfo/ubuntu-uk > https://wiki.ubuntu.com/UKTeam/ -- ubuntu-uk@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-uk https://wiki.ubuntu.com/UKTeam/