Hi! I want to report that I'm having a very similar problem since some months ago. It is a woody install, with 2.4.18 stock debian kernel. It doesn´t freeze, but the clock derives very quickly from real time. I have just checked the timer interrupt, and it seems that it's ticking at 99Hz. The computer has a PS/2 KVM-switch plugged (it emulates a real keyboard). Any recommendation?
quebracho:~# uname -a Linux quebracho 2.4.18-1-686 #1 Wed May 17 21:26:54 UTC 2006 i686 unknown quebracho:~# ntpdate pool.ntp.org; date; grep timer /proc/interrupts 2 Jul 00:25:22 ntpdate[22616]: adjust time server 194.88.2.50 offset 0.445936 sec Sun Jul 2 00:25:22 ART 2006 0: 71271791 IO-APIC-edge timer quebracho:~# sleep 300 ; ntpdate pool.ntp.org; date; grep timer /proc/interrupts 2 Jul 00:30:44 ntpdate[22839]: step time server 193.224.70.7 offset 1.868128 sec Sun Jul 2 00:30:44 ART 2006 0: 71303713 IO-APIC-edge timer quebracho:~# bc bc 1.06 Copyright 1991-1994, 1997, 1998, 2000 Free Software Foundation, Inc. This is free software with ABSOLUTELY NO WARRANTY. For details type `warranty'. sacle = 3 (71303713-71271791)/322 99 quebracho:~# cat /proc/interrupts CPU0 0: 71318403 IO-APIC-edge timer 1: 502 IO-APIC-edge keyboard 2: 0 XT-PIC cascade 8: 3 IO-APIC-edge rtc 14: 96936927 IO-APIC-edge ide0 15: 96939199 IO-APIC-edge ide1 17: 147105499 IO-APIC-level eth0 NMI: 0 LOC: 71817675 ERR: 0 MIS: 0 -- Martín Ferrari