system clock drift in Debian 3.0r2 (Woody) on PB G4

[Bill Edwards <wse@mac.com>]

My system clock is losing more than one minute out of every five 
minutes.  Here are my system details:

Hardware:  Powerbook G4 667 MHz
Debian:    3.0r2 (Woody), PowerPC
Kernel:    2.4.23 (benh)

I have also seen this behavior under Yellow Dog Linux 3.0, which I 
believe is also running a 2.4.x kernel.  It looks as though my 
timebase frequency is synced with the decrementer frequency reported 
in the boot-up messages.  I am currently sync'ing my system clock 
every five minutes with the time server at work, which not viable, 
long-term.

Please email me directly with any hints or solutions you might have, 
and I will summarize to the list.   Thanks very much!

-- Bill Edwards
   wse@mac.com