I can confirm this problem is still exhbiting with "Linux serpentine 2.6.15-23-k7 #1 SMP PREEMPT Tue May 23 14:20:54 UTC 2006 i686 GNU/Linux". I have a Logitech Bluetooth Desktop pack, so my keyboard and mouse (MX900) both run off bluetooth.
Some new information: The problem affects the bluetooth mouse as well. Also the mouse will move for a very short time after gdm/X is loaded. This problem could be related to the bluetooth subsystem, however I wasn't aware that Linux was loading the bluetooth subsystem. Even with bluez installed Linux can't recognise the receiver, which does work as a dongle in Windows. The mouse and keyboard run fine without bluetooth support in the OS, as exhibited by keyboard support in the BIOS. I am using a constantly updated Dapper Flight 6. -- Usb keyboard dies when gdm starts https://launchpad.net/bugs/32938 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs