On Sat, 2006-06-24 at 18:28 +0100, Peter Farrow wrote: > Dear All, > > I have installed Centos 4.3 64bit on an Athlon 64 3700 running in a > Sapphire Radeon Xpress chipset based motherboard. > > It has SATA2 disks, and the chipset works fine under Linux, gives good > i/o performance etc. > > However, the Linux clock runs about 2.5x normal rate, [ so this machine > is well into next week already!] > > Yet when you reboot it and look at the bios time it says the correct > time and the clock runs at the right speed. > > When the system boot back into Linux, the clock starts off at the right > time again but then goes racing forwards at more than double speed > . > > It seems the kernel can't count the ticks correctly. > > Even the watch command can't count seconds correctly so "watch date" > updates every second, which of course the system thinks is two seconds > > I tried both the 2.6.9-34 and 2.6.9-34-01 kernels with the same result. > > I might change the mobo, > > Does anyone else have any ideas? I had something similar when I installed FC5 on my 64bit laptop. The problem was fixed in later kernels but with older kernels iirc you could solve it by specifying "i8042.nomux" as a kernel boot option. Regards, Patrick