Clock does not keep time

Clock does not keep time

[Maier Gerfried]

Dear Kernel-List,

I'm using Linux (kernel 2.4.20 with acpi-20021212 and swsusp-beta16 patches) on 
my Acer Travelmate 630 notebook.

Unfortunately I experience the problem, that under some [1] conditions the RTC 
does not keep time. It runns in advance compared to the real time, up to 
several hours per 12 hours of time. The machine is quite new, so I don't think, 
that the RTC-battery is already exhausted.

I was able to gain the information that the RTC in this notebook is a BQ3285LF 
(is manufactured from TI  - Datasheet for instance at 
http://www.scanti.ru/docs/datasheets/slus183.pdf - and probably others).

Is such a problem known to you?
Is it possible that it is a kernel issue or do you think it is a hardware-bug?
How could I debug this issue?

Thanks a lot for any suggestions
Maier Gerfried


[1] I was not able to find out under what conditions. I first thought that it 
could be temperatore-dependant, or if the power supply is on line or not, if I 
booted windows before. Unfortunately I was not able to find the reason by now.
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Re: Clock does not keep time

[Maier Gerfried]

Zitat von Maier Gerfried <moali@sbox.tugraz.at>:

> Dear Kernel-List,
> 
> I'm using Linux (kernel 2.4.20 with acpi-20021212 and swsusp-beta16 patches)
> on my Acer Travelmate 630 notebook.
> 
> Unfortunately I experience the problem, that under some [1] conditions the
> RTC does not keep time.

I've done some "research" on this during the night (trying out 2.4.21-pre3 with 
acpi-20030109, but without swsusp), and it seems to me, that a kind of "time-
corruption" occurs on boot. (Looking into the Bios-Setup before the time still 
seems to be ok, but when booting and logging in a time-step has occured) But I 
cannot make a general statement by now.

Any hints are very welcome
Maier Gerfried
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