Question about HP Pavilion ze2000 Notebook
The laptop is a hp pavilion ze2000 with 1gb ram and running win xp. The clock on the laptop does not keep the right time and the system has trouble starting up.
Why does the clock on my laptop keep incorrect time?
Your laptop has two or more clocks, and
FreeBSD has chosen to use the wrong one.
Run dmesg(8), and check for lines that contain Timecounter. The last line printed is the one that FreeBSD chose, and will almost certainly be TSC.
# dmesg | grep Timecounter
Timecounter "i8254" frequency 1193182 Hz
Timecounter "TSC" frequency 595573479 Hz
You can confirm this by checking the kern.timecounter.hardware sysctl(3).
# sysctl kern.timecounter.hardware
The BIOS may modify the TSC clock--perhaps to change the speed of the processor when running from batteries, or going into a power saving mode, but FreeBSD is unaware of these adjustments, and appears to gain or lose time.
In this example, the i8254 clock is also available, and can be selected by writing its name to the kern.timecounter.hardware sysctl(3).
# sysctl -w kern.timecounter.hardware=i8254
kern.timecounter.hardware: TSC -> i8254
Your laptop should now start keeping more accurate time.
To have this change automatically run at boot time, add the following line to /etc/sysctl.conf.
Take it back to the place where you purchased it and explain the
situation to them as it is still under warranty.
Posted on Jun 04, 2010
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Posted on Jan 02, 2017
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