After running FC2 for the initial few hours, it became evident to me that its 2.6 kernel is not keeping time as well as FC1's 2.4 kernels. I had been running NTP off, using the djb clockspeed hack to keep time stable to within a few msec per week, but FC2 immediately began loosing several seconds per hour. To compensate, I've turned off clockspeed and reenabled NTP, which has apparently tamed my time of day clock. However, the ntp drift file is showing about -150 ppm where it had previously been closer to -20 ppm. I understand that the ACPI support does things like adjust various system clocks and other power saving features, with the second order effect of reducing the noise from cooling fans. All in all, I'd say this is a good thing for me. However, for people who want to improve their inherent time-of-day stability, I conjecture that disabling ACPI/APM features in the BIOS may help. Romain
