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Poll: Do you think its possible to overclock the N900?!
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Do you think its possible to overclock the N900?!

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kulas is offline kulas
2010-06-13 , 04:50
Posts: 199 | Thanked: 22 times | Joined on Apr 2010 @ Philippines
#4481
Originally Posted by gabby131 View Post
if you mean to permanently oc their device to 850mhz, yes, some are doing that
tnx gabby!
 
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moepda is offline moepda
2010-06-13 , 07:38
Posts: 334 | Thanked: 118 times | Joined on Apr 2010 @ United Kingdom
#4482
mine is set similar to that ...

500-900 when phone is unlocked
250-500 when phone is locked (screen/keys or locked with security code)
 
noipv4 is offline noipv4
2010-06-13 , 07:46
Posts: 193 | Thanked: 92 times | Joined on May 2010 @ galveston, tx
#4483
Ok, Enabling Smartreflex on VDD1, which controls the CPU, IVA, and DSP works until 805MHz with Titan's kernel, default kernel-power configuration and PR 1.2/
 
gabby131 is offline gabby131
2010-06-13 , 11:32
Posts: 1,729 | Thanked: 388 times | Joined on Jan 2010 @ Canada
#4484
Originally Posted by kulas View Post
tnx gabby!
the procedures for permanent overclocking is on the wiki (wiki.maemo.org/overclocking).
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if i did help you, just click "Thanks" on the lower right of my post. thanks!

"The best way to break a Spell is to prevent it from being cast in the first place"

N900: 1000/1150mhz; sampling_rate 15; up_threshold 150000;
 
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matts76 is offline matts76
2010-06-13 , 12:55
Posts: 324 | Thanked: 201 times | Joined on Apr 2010 @ UK
#4485
Originally Posted by moepda View Post
mine is set similar to that ...

500-900 when phone is unlocked
250-500 when phone is locked (screen/keys or locked with security code)
What application and codes are u using to set different freqs on lock/unlock? sounds really cool.
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My N900@1Ghz Rocks
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moepda is offline moepda
2010-06-13 , 18:18
Posts: 334 | Thanked: 118 times | Joined on Apr 2010 @ United Kingdom
#4486
Originally Posted by matts76 View Post
What application and codes are u using to set different freqs on lock/unlock? sounds really cool.
all taken from here :

http://wiki.maemo.org/Overclocking#U..._.28by_Fecn.29

thats standard set up from script author, i go up to 900 not 1150 .use his info for location of files etc etc...

i use latest kernel power settings/scripts from titan .

attached is my version of scripts (i found battery % never worked with battery temperature so only use that script)

you do need battery modprobe installed for this but full instructions in zip file for that. i reccommend openSSH and pc to copy the files and remember to make local/bin/underclock and overclock executable.

once all that done backup default config in usr/share/kernel-power-settings by renaming and create new config called default based on your config that you use (ideal,lv,xlv etc) load that config/save config/set to load at boot(essential) with info in zip file (installextra).

attached my config that i tested to work in zip file. took days to get it to work properly (see my previous posts!!) so reccommend use my files as base and adjust after you confirm it works as i did

any questions just ask
Attached Files
File Type: zip clock when phone is LockedUnlocked.zip (4.4 KB, 125 views)
Last edited by moepda; 2010-06-13 at 18:21. Reason: extra info
 

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Darkslayer is offline Darkslayer
2010-06-13 , 21:45
Posts: 14 | Thanked: 5 times | Joined on Jun 2010
#4487
Hey everyone, just want to share some user experience about the topic.
I've been using my n900 for about 3 months and almost a month OC'ed (900, recently - 1000). Btw I am using latest kernel-power from repos and temporary oc through queen beecon.
When I was using 900mhz setting the device temperature remained fine, unfortunately I even didn't monitor it but the general feeling was about that nothing changed in terms of heat if to compare it with stock frequency.
Then I tried 1ghz and surprisingly found out that the difference in terms of speed betwen 900-1000 was almost as noticeble as between 600-900 so I decided to give it a try. Ok, I agree that it's very argueble point when we are speaking about perfomance, but for me it seemed to be noticeble faster. Later on I also found out that the device temperature rises alot at this frequency. I am using bq27x00_battery module to monitor the temp. I know it is not reliable, but it the only way to convert feelings into numbers.
Well, from a few tests that i've made I found out that with 1ghz temperature exeeds 50' degrees (my record is 53) at full load (e.g. watching youtube video) and ranges between 45-50 while active browsing. It makes the device very hot, especially when touching its hw keyboard. And with 600mhz (not that "stock" as it seems, cause kernel-power uses different voltages than stock nokia kernel - am i right here?) temperature rarely get over 45 and it is usually about 40 at decent heavy load.
After some research here, it seems to me that i found the right explanation: the 1000mhz uses 1.350v which differs from previous used voltage for 0.075 which is pretty considerable in terms of voltage settings used by device. Is this the real reason causing heat?
And one more question: did i get it right, that if I installed latest kernel power + settings and just set limits to (e.g.) 250 1000 I get the same voltage table as listed as "titan's LV kernel" on the wiki page?
 
ahmadamaj is offline ahmadamaj
2010-06-13 , 21:59
Posts: 223 | Thanked: 79 times | Joined on Apr 2010 @ Lebanon- Beirut
#4488
@ Darkslayer when wifi is on it increases the temp and makes the device very hot (40-45 even when on 600) so you have to take that into account.
 

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marduk1015 is offline marduk1015
2010-06-14 , 03:23
Posts: 3 | Thanked: 0 times | Joined on Jun 2010
#4489
Originally Posted by titan View Post
EDIT: this post is outdated. please goto http://wiki.maemo.org/Overclocking

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
how do I download kernals?
 
geneven is offline geneven
2010-06-14 , 03:47
Posts: 5,795 | Thanked: 3,151 times | Joined on Feb 2007 @ Agoura Hills Calif
#4490
Of course, the material you are quoting is outdated.

You download the latest kernel by installing the Enhanced Linux kernel for power users, which is available from the Application Manager. You also need the Enhanced Linux kernel for power users settings, available from the same place.

You also need to read http://wiki.maemo.org/Overclocking
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