Winter time - clock always 20 minutes off

Question

Hi,
Twice a year, the time changes here, and in october the time changes to winter time. Apparently my Archlinux does that automatically, how nice of it.
However, EVERY time, so I go through this shit twice a year, the week or two weeks after such a time change, my computer is always +/- 20 minutes off when I reboot it.
For example:
Today I booted up my computer at 7:45PM, and the time it displayed was 7:21PM.
You see? The error is not one hour, it is something near 20 minutes.
So I use "date -s" to set it to the actual date. And for the coming week or so I'll have to do that every time after I reboot again, because tomorrow when I reboot, the day after that, and so on, it'll always do this again. And after a week or two it'll suddenly stop happening.
I'd like to ask two things:
-How do I fix this, I find this very annoying and NEVER want to see this again.
-Why does it happen? Why 20 minutes? What kind of process could be programmed to do something confusing to the clock involving a time of around 20 minutes?? It could be Archlinux itself, or KDE 3.5, or something else, I haven't got a clue.
Please help, I'm tired of this shit twice a year.
Windows doesn't do this by the way, so don't blame my hardware.

Answer 1

It was the hwclock. So it kind of was my hardware to blame anyway.
I did "hwclock --systohc" and hopefully that fixed it forever.
Sorry if my post sounded a bit frustrated, it's just because it was such an annoying problem.
It still remains a problem with weird behaviour: on a day where the time changes, it does it perfectly when booting that morning. The next +/- 14 days, it's skewed every morning. Then it's stabilized again.
Thanks for the help!
Last edited by aardwolf (2010-11-01 19:18:21)