Date: Tue, 21 Mar 2006 11:05:29 -0800 From: Alfred Morgan <alfred.morgan@experclick.com> To: freebsd-questions@freebsd.org Subject: clock drifts after upgrade from 5.x to 6.x Message-ID: <44204E79.4090408@experclick.com>
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I have upgraded 4 different machines from various FreeBSD versions of 5 to various versions of 6 and 3 of the machines has a problem where the clock will drift very quickly slowing about 2 seconds per minute. These are the machines with dmesg | grep time: (specs from [1]www.hp.com) *(no drift) HP pavilion a510n (Via KM400A, ASUS A7V8X-LA) Timecounter "i8254" frequency 1193182 Hz quality 0 Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000 acpi_timer0: <24-bit timer at 3.579545MHz> port 0x4008-0x400b on acpi0 pmtimer0 on isa0 Timecounter "TSC" frequency 2100094312 Hz quality 800 Timecounters tick every 1.000 msec *(bad drift) HP pavilion a510n (Via KM400A, ASUS A7V8X-LA) Timecounter "i8254" frequency 1193182 Hz quality 0 pci0: <multimedia, audio> at device 17.5 (no driver attached) pmtimer0 on isa0 Timecounter "TSC" frequency 2100088469 Hz quality 800 Timecounters tick every 1.000 msec *(bad drift) Compaq Presario SR1230NX (Via KM400A, A7V8Z-LA) *(bad drift) Compaq Presario S6500NX (Via KM400, ASUS A7V8X-LA) Timecounter "TSC" frequency 2158040786 Hz quality 800 Timecounters tick every 1.000 msec Timecounter "i8254" frequency 1193182 Hz quality 0 The one computer that did work (the first HP pavilion a510n) seems to be the only one with ACPI enabled. -alfred References 1. http://www.hp.com/
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