Keyboard and mouse no more responding

On our SuSe 11.1 PC keyboard and mouse are no more responding although it did work properly until yesterday. We shut down the computer yesterday evening and today they do not work anymore.
But it is not a hardware problem, we can use keyboard and mouse until Grub bootloader, but as soon as we start a Linux session (doesn’t matter if normal or failsave mode) the keyboard and mouse are disabled, we can see that because the NumLock and CapsLock LEDs are switched off immediately.

We have no idea what happened. We booted from CD into rescue mode and mounted the hard disk manually and checked some logfiles, but the boot.log tells us that USB keyboard and mouse are detected, as well as the Xorg.0.log file. And we found no indication that keyboard or mouse are disabled or something like that.
So, any hints and ideas are wellcome. :stuck_out_tongue:



Nobody any idea?

What can we do to check?