Thanks for you replies.
Correction, the low power mode seems to occur on resume after
suspend-to-ram. I was booting on AC alone and on battery
alone and got the same fast mode. I had to do suspend-resume
to reach the power save mode.
This is strange. There is only one frequency and there seems to be no major
difference in kstat cpu_info output between the two modes. There is only
one cpu. I have double checked that the applications indeed run 35% slower
after suspend/resume.
Normal AC (fast mode):
# kstat cpu_info | grep Hz
brand Intel(r) Celeron(r) M processor
900MHz
clock_MHz 900
current_clock_Hz 900077566
implementation x86 (GenuineIntel 6D8 family 6 model 13
step 8 clock
900 MHz)
supported_frequencies_Hz 900077566
After suspend/resume (on battery):
# kstat cpu_info | grep Hz
brand Intel(r) Celeron(r) M processor
900MHz
clock_MHz 900
current_clock_Hz 900072114
implementation x86 (GenuineIntel 6D8 family 6 model 13
step 8 clock
900 MHz)
supported_frequencies_Hz 900072114
/Karl D
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