Originally Posted by titan

looks good. remember to shutdown and boot, not reboot!

Originally Posted by MarkyboyUK

I have done the following in this order but I'm not sure if the kernel speed/voltage changes are being applied.


1) From a clean pr 1.1.1 I have installed the latest kernel package (24?) from apps manager
2) Installed the power kernel settings/config app also from app manager
3) Restarted the phone
4) opened xterminal
5) Typed sudo gainroot (rootsh is installed)
6) Typed sudo /usr/sbin/kernel-load /usr/share/kernel-power-settings/ideal (which I understand will allow me to test the "ideal" kernel config without making permanent changes)

So I thought I would check if my minimum clock speed was now fixed at 500mhz (as set in the ideal file by default) using the conky app. But my min clock speed is actually 250Mhz which leads me to think that the above commands are not working or I have missed something out.

Can anyone spot my mistake please?

Edit to add, I do not have a file called "kernel-power" in my /etc/default directory - is this normal when only wanting to "test" settings before making them permanent or do I need this file even when just running in "test" mode?

Thanks

Originally Posted by Jokah

YES it worked, you are my saviour, thanks alot

Originally Posted by titan

I have uploaded two new low voltage kernels.
Both are the same as the maemo20 kernel in extras-devel except for the lower voltages,
i.e. they preserve your freq. limits over phone calls and don't lock to 600Mhz during phone calls.
The default limits are 250-600 MHz.
A new feature in all maemo20 kernels is the bq27x00_battery module by Matan
which gives you more info about the battery in /sys/class/power_supply/bq27200-0/

The ultralow voltage (ulv) kernel is inspired by Letho's settings.
The less extreme low voltage (lv) kernel is inspired by Matan's settings.

Download ULV:

Code:

wget http://maemory.com/N900/overclock/ulv/kernel-maemo_2.6.28-maemo20_armel.deb
wget http://maemory.com/N900/overclock/ulv/kernel-modules-maemo_2.6.28-maemo20_armel.deb
wget http://maemory.com/N900/overclock/ulv/kernel-flasher-maemo_2.6.28-maemo20_armel.deb

Download LV:

Code:

wget http://maemory.com/N900/overclock/lv/kernel-maemo_2.6.28-maemo20_armel.deb
wget http://maemory.com/N900/overclock/lv/kernel-modules-maemo_2.6.28-maemo20_armel.deb
wget http://maemory.com/N900/overclock/lv/kernel-flasher-maemo_2.6.28-maemo20_armel.deb

Installation

Code:

dpkg -i kernel-m*
dpkg -i kernel-f*
halt

replace the values (as root) for temporary change

Code:

echo 124999 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
echo 599000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq

or edit /etc/pmconfig for permanent changes of the frequencies.

To enable 125Mhz use 124999 for scaling_min_freq.
According to BlackDiamond you should
"echo 1 > /sys/devices/system/cpu/cpu0/cpufreq/ondemand/ignore_nice_load"
for 125MHz http://talk.maemo.org/showpost.php?p...&postcount=185

Also try the hint by nightfire http://talk.maemo.org/showpost.php?p...&postcount=170 for improved responsiveness.

The warning "WARNING: at /home/builder1/maemo-fremantle-armel-extras-devel/work/kernel-maemo-2.6.28/arch/arm/mach-omap2/clock34xx.c:443" some people see in dmesg indicates that we don't really know what we're doing
The same applies to the DSP settings - it is not clear whether Letho's and my kernel actually set them to >430MHz. Someone familiar with frequency selection should have a look at the code...

so far the ULV kernel works fine for me with [125,600] Mhz till 850 MHz. 900 crashed it. EDIT: I just increased the 900 voltage in an update
EDIT2: another update replaced 800 by 810MHz in ULV and LV kernels

Originally Posted by Dr.Marcial

Question: Is the power-flasher version running the boot-loop proof script?
is it running the nice load/ increase responsiveness script?