Hi, it has taken a long time to find out why I was unable to run any 2.6 Kernel (2.6.0 - 2.6.5). The Problem is, that if I do not have usb support compiled in (or as as module) my PS/2 Keyboard and PS/2 Mouse does not work and immeditley freeze when X starts (though the system is still running as I could see on the system clock). Keyboard works, as long as I do not start the X server, but soon as X has started the Keyboard freeze. The Mouse never worked. Both work fine under 2.4.x without USB I consider this as a bug, as this is nowhere documented that usb is needed to run PS/2 periphals (or at least nowhere where I looked [ Documentation/Google/kernel list]) My setup is Microsoft Office Pro Natural Keyboard connected via PS/2 Adapter Microsoft Optical Mouse also connected via the PS/2 Adapter in between sits a KVM Switch. X is at Version 4.4.0 relevant sections of XF86Config Section "InputDevice" Identifier "Mouse" Option "Protocol" "IMPS/2" Option "Device" "/dev/misc/psaux" Driver "mouse" Option "ZAxisMapping" "4 5" EndSection Section "InputDevice" Identifier "Keyboard" Option "XkbModel" "pc105" Option "XkbLayout" "de" Driver "keyboard" EndSection dmesg is attached to this mail