Just a reference for people searching for my laptop model (Ahtec Signal
X-9600, Quanta Z500N series, Quanta ZW9):
After years of hesitation -I didn't want to brick my laptop with an
incorrect BIOS!- I updated it to version Q3B21 (mine was Q3A12)
I found the BIOS update at:
I was able to solve my broken ACPI tables by decompiling and fixing the
DSDT.
The frequency field for the 600 MHz state was 0, hence the line in dmesg:
ACPI: Invalid _PSS data: freq is zero
I set it to 600, compiled it again and added it to the initrd. Now I can use
acpi-cpufreq to scale the cpu
Hi, I'm trying the Hardy Heron LiveCD now. The problem is still the same,
Pentium M 1.6 GHz stuck at 1600 and it won't go down. Same problem in
Windows, so in my case it is a BIOS bug of the laptop, a Quanta ZW9 (Ahtec
X-9600M).
I tried this too:
[EMAIL PROTECTED]:~$ sudo modprobe
I have the same problem. After upgrading to Gutsy, speedstep doesn't
work. Pentium M 725 is stuck at 1600MHz.
I tried this:
# modprobe speedstep-centrino
FATAL: Error inserting speedstep_centrino
(/lib/modules/2.6.22-14-generic/kernel/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.ko):
No
