Messages in this thread | | | Date | Wed, 27 Mar 2002 17:33:06 +0000 (GMT) | From | Mark Cooke <> | Subject | Re: time jumps |
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There is a hardware bug on some via 686a systems where the RTC appears automagically change it's programmed value.
A patch was originally made against 2.4.2, and some version of this appears to be applied to current kernels (I don't have a vanilla 2.4.17 to check against). Look in arch/i386/kernel/time.c for mention of 686a.
It appears to only be used if the kernel's not compiled with CONFIG_X86_TSC though, so if you have that defined you may not see the problem at all...
Mark
On Wed, 27 Mar 2002, Bernd Schubert wrote:
> Date: Wed, 27 Mar 2002 16:28:35 +0100 > From: Bernd Schubert <bernd-schubert@web.de> > To: linux-kernel@vger.kernel.org > Subject: time jumps > > Hi, > > we have a computer here, that behaves very strange, from one second to > another the clock changes to about 1h in the future. In the next "real" > second the time is normal again. > Well, I first thought that is might be a X problem, but after running a loop > over "date", it really seems that the system clock is affected. Then I > thought it might be a conflict with the hardware clock, but after resetting > it to the system time, the problem was still there. > > The only clock that doesn't seem to be affected is the realtime clock (at > least not when doing a loop of cat over the proc-file). > > The problem is, that this time jumps cause the Xserver to enable its > screensaver (and several other small problems). > > System is: Athlon 650 on VIA board with linux-2.4.17 (unpatched) > > > So has anyone an idea what to do, I'm thinking about a BIOS update (but don't > really believe that it will help). Or is it possible to patch the kernel that > it uses the realtime clock (could anyone of you send me this patch, if it is > possible, please??). > > > Of course, I can give further information, if needed. > > Thanks in advance, Bernd > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >
-- +-------------------------------------------------------------------------+ Mark Cooke The views expressed above are mine and are not Systems Programmer necessarily representative of university policy University Of Birmingham URL: http://www.sr.bham.ac.uk/~mpc/ +-------------------------------------------------------------------------+
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