Overclock the N900? - Page 157 - maemo.org

firstknight | # 1561 | 2010-04-07, 16:45 | Report

Originally Posted by psrkn View Post

From a couple posts up, there is a post from Titan and said that another observation: The dmse daemon seems to overwrite the max. freq. in the kernel with the value
from /etc/pmconfig every hour or so.

does that mean tat if i dun change on the pmconfig i will face the change back to 600 at any given time my phone check pmconfig?

anyway to work around?

mikhmv | # 1562 | 2010-04-07, 16:49 | Report

I run >24h at 1000Hz. It is great.

For safe testing with /etc/pmconfig
I did following:
1. cp /etc/pmconfig /etc/pmconfig.bak
2. echo "cp -r /etc/pmconfig.bak /etc/pmconfig" >> /bootmenu.sh
3. edit /etc/pmconfig
4. reboot with closed keyboard. If device will not boot reboot with open keyboard....

rebooting with open keyboard will restore /etc/pmconfig from /etc/pmconfig.bak

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UNderworld | # 1563 | 2010-04-07, 16:57 | Report

12 hours idle... 3g, no internet, 1 call (didnt answer)
10% battery, 50% to 40%...

currently on 900/500dsp ..

if i do
echo 930000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq

would it work if I increase it in 20mhz? or 10??
for e.g 930000 then 950000 then 960000 up to 1ghz...??

I know its up to my phone, but is the command right?

When I restart my phone, will it come back to 900mhz? (currently 900/500 lehto's one)??? thanks

PhonoN900 | # 1564 | 2010-04-07, 17:00 | Report

Originally Posted by firstknight View Post

does that mean tat if i dun change on the pmconfig i will face the change back to 600 at any given time my phone check pmconfig?

anyway to work around?

I've found a fairly simple workaround...

Install Desktop Command Execution Widget, create a command with the propper parameters (see pg 148 of this thread), and set the update interval to 30 minutes.

I just did this, and will keep an eye on my clock speed to see if that will circumvent the issue (it should, in theory). The other nice thing this widget does is run the command on startup...

Just food for thought.

Cheers,
Phono

rizbert | # 1565 | 2010-04-07, 17:03 | Report

Been trying to finish reading this thread before posting...only been a few days!
Overclocked using the fiasco image of lehto's 800 image..gone well so far, lovely smooth & quick reponse although I have had the warnings come up from dmesg. Plus my phone info is still intact...Won't go any higher on overclock...just see how this goes.

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titan | # 1566 | 2010-04-07, 17:05 | Report

Originally Posted by Matan View Post

You can try using my patch - http://my.arava.co.il/~matan/770/n900/freqs.diff
It reduces the voltage for the frequencies 550 and 600 to OPP3 level (the one used for 500 in Nokia's kernel, and uses OPP4 level for 720-1000 (the same level as originally used for 550). Highest level (OPP5) which is used for 600 in Nokia's kernel, is not used at all in my patch. Of course, the result will be lower maximum frequency in some CPUs, but my is stable at 1000MHz even at this lower voltage.

EDIT: this post is obsolete. go to http://wiki.maemo.org/Kernel_Power

I have uploaded experimental undervoltage kernels based on your suggestion
http://maemory.com/N900/overclock/undervolt/
but it's not stable on my device. Be prepared to reflash!

Code:

wget http://maemory.com/N900/overclock/undervolt/kernel-maemo_2.6.28-maemo20_armel.deb
wget http://maemory.com/N900/overclock/undervolt/kernel-modules-maemo_2.6.28-maemo20_armel.deb
wget http://maemory.com/N900/overclock/undervolt/kernel-flasher-maemo_2.6.28-maemo20_armel.deb
dpkg -i kernel-m*
dpkg -i kernel-f*
halt

Last edited by titan; 2010-05-15 at 13:02.

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UNderworld | # 1567 | 2010-04-07, 17:12 | Report

there DEFINITELY IS a damn noticeable improvement from 900 to 1ghz.....

Matan | # 1568 | 2010-04-07, 17:29 | Report

Originally Posted by titan View Post

I have uploaded experimental undervoltage kernels based on your suggestion
http://maemory.com/N900/overclock/undervolt/
but it's not stable on my device. Be prepared to reflash!

Even at 600Mhz is it unstable? On the Pandora, the default is 600MHz at OPP3, and they don't report any issues (they do have very few devices, though).

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AsiQue | # 1569 | 2010-04-07, 17:38 | Report

guys
i use titans maemo19 kernel and in pmconfig i have maxfreq=800000
when i start my nokia everything is ok and cpufreq/scalingmax shows 800000
but after some time (i suspect that charging is involved) the max freq is reset back to 600000

has anyone encautered that??

tnx
asique

titan | # 1570 | 2010-04-07, 17:40 | Report

Originally Posted by Matan View Post

Even at 600Mhz is it unstable? On the Pandora, the default is 600MHz at OPP3, and they don't report any issues (they do have very few devices, though).

yes, with 125-600MHz it crashed after a few minutes with a garbled screen.