On Thu, 2003-01-30 at 01:35, Kevin B.Hendricks wrote: > Hi, > > FWIW on my dual G4 the hardware clock loses between 3 and 5 minutes per > 24 hour period. > > I finally set up an hourly cron job to try to keep my clock current.
There are 2 different things: - The software clock maintained by the kernel. This one requires proper bus speed calibration, which can be an issue on recent machine, thus causing significant drifts. I'm working on a fix for this. - The hardware clock (hwclock output) is maintained by the PMU and is _supposed_ to be relatively accurate. However, I noticed some recent machines appear to show an "i2c-hwclock" node below the PMU node, and I'm wondering if Apple added a stock hwclock chip on the PMU i2c bus in order to replace the PMU's own (if any) or if this is just making an old stuff visible in the device-tree. I'll investigate that when I get one of the new machine. Ben.
