Im using slackware 9.1 with kernel 2.6.3 patched with prism45 driver.

when using slackware it seems to be loosing time.

example

at 7:00 i start my laptop and the time on LT is 7:00

at 8:00 the time is 7:45 on my LT

it seems to loose more and more time the longer it is on.

any ideas?

weak battery on your mobo?

Are you loosing time in your BIOS as well?

its a packard bell with a p4 3.06Ghz NO hyper threading.

ill check the BIOS tonight, dont think it is loosing time there.

I have got the Real time clock module build into the kernel but that did not make a diffrence.

EDIT:

This is happening when im sat at home using my laptop on the powser supply.

I'm having exactly the same problem on my Dell Inspiron 8200, except that it happens in both the 2.4.22 and 2.4.25 kernels (haven't tried it with the 2.6.x kernels yet). I lose time both when running Linux and in my BIOS. I have noticed that every once in a while my computer sort of "freezes" for about 5-10 seconds and then resumes normal operation. Thinking it might be an ACPI problem, I've even started Linux with the "acpi=off apm=off" command at boot-up and it still seems to happen. I've noticed no other problems with my laptop operation though.

I also am pretty sure it isn't a memory problem (that seems to be the prevalent suggestion other places I've gone to try and figure this out), since I recently upgraded my memory from 512 MB to 1 GB (2 256 MB chips -> 2 512 MB chips) and it happened with both the old and new memory configurations.

I hate to be a language nazi, but this error annoys me to no end. I believe you are losing time. Not loosing time.

sorry im dislexic

I am also "losing" time in the BIOS as well.

I have a feeling it maybe the kernel config but im not sure what could cause it.

I am also running acpi, this could be the cause. Unfortunatly i need acpi so that my laptop will turn off when i shut it down.

You can use apm to shutdown the laptop right? Yes, most likely the mobo time will be affected. You can set up ntp and sync it with one of the time server around the world. That could fix your prob.

apm does not work for shutting down the laptop.

mobo??

the laptop is not on the net all the time so when im losing 15 in an hour some times and i am on on the net i would still lose time.

My speculation is, that could be related to trojan horse, that mean ur system could already be infected. That is hairy to clean up. I got it several time previously, but I am not sure to bind it with trojan horse.

Wut am quite sure is that my system is highly possible infected by such uninvited mess.
Keystroke loger which periodically sent the log through certain port or socket to the intruder. Every thing wut u type is recorded, so no use to change password. Backdoor is also installed.

Cleanest way out is to reinstall, but be advised that every thing u back up could already been infected. If u don't have important data to lose, u might try playing to find out wut is going on. But it is very danger, if it is really infected.. then root access must already been knacked, so they have total control over ur system. That mean they can do danger stuff to damaged ur system, access to bios is very danger.

Netstat -val possibly display which services is opened (if not already binary trojaned). I hadn't found in which package netstat resides for reinstall it. Reinstall packages could possibly remove those trojaned binaries, but it is highly possibly that rm binary is trojaned to not rm the trojaned files.

Interesting reading:
http://project.honeynet.org/papers/enemy/

i cant see how the last post is to do with losing time. Is this a misposting?

Trojaned system COULD caused that time losing ..

if you have windows installed, check to see if time is being lost in windows

i really don't think that the kernel can affect the bios, so it can't be a kernel problem if the bios itself is unable to keep track of time

contact your notebook manufacturers and ask them for help (but don't mention linux; some techs get scared and say that linux "taints" the system and immediately declare that linux is what is causing all the problems)

Mogwa, "mobo" is short for motherboard. Your system clock definitely should not be 15 minutes slow after using the PC for just one hour. Obviously over time it's normal for different clocks to gradually get out of sync (such as your wristwatch vs. a wall clock vs. your PC clock) but not by that much in such a short time. One question: do you normally leave the PC turned on and do you have any very CPU-intensive processes starting up while you are away? For instance, if you've got a screensaver (or whatever) that eats up 99%-100% of the CPU when it's active, in theory that kind of long-running, heavy load on the CPU could negatively affect other parts of the system. That admittedly may a long shot, but could be a factor. Do you have a tool (such as gtkrellm) to monitor CPU usage? If so, that may reveal something interesting.

Anyway, as carboncopy suggests, you can sync your clock using ntp. -- J.W.