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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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matts76's Avatar
matts76 is offline matts76
2010-06-14 , 08:43
Posts: 324 | Thanked: 201 times | Joined on Apr 2010 @ UK
#4491
@moepda, thanks for the reply mate, but i dont have a pc/laptop at the mo (girlfriend dropped it ) and i have verry little command line experience.
I was really hoping it would be a nice easy to use application, so i guess ill give it a miss for now, does sound really cool though.
Im sure ive seen an app around that executes commands when different functions are used so maybe ill take a look at that.

Thanks for the offer of help with this though.
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My N900@1Ghz Rocks
I wanted a phone, but i ended up with an all encompasing obsession
 

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moepda's Avatar
moepda is offline moepda
2010-06-14 , 10:26
Posts: 334 | Thanked: 118 times | Joined on Apr 2010 @ United Kingdom
#4492
no worries , not good with command line either pc so much easier !!!
 
paan_fls is offline paan_fls
2010-06-14 , 11:38
Posts: 7 | Thanked: 0 times | Joined on Jun 2010
#4493
hallo.just want to ask u.
i used the ideal profile for overclocking.
but in some apps especially in web browsing,my device booted up.
so i change to this profile

sudo gainroot
kernel-config load lv
kernel-config limits 250 850

n it seemed stable for my device.but will this profile give a bad impact to my device,since i read in a link u posted .
it said

"As can be seen from the formula lower voltage plays greater part in CPU consumption than frequency. By reducing the voltage the damage of overclocking can be reduced and the battery life time extended"

is this mean that when im using lv profile,i gnna damage my device n battery lifetime in d future? bcs it uses more voltage..
 
imacmillan is offline imacmillan
2010-06-14 , 15:25
Posts: 111 | Thanked: 27 times | Joined on Apr 2010
#4494
Originally Posted by paan_fls View Post
hallo.just want to ask u.
i used the ideal profile for overclocking.
but in some apps especially in web browsing,my device booted up.
so i change to this profile

sudo gainroot
kernel-config load lv
kernel-config limits 250 850

n it seemed stable for my device.but will this profile give a bad impact to my device,since i read in a link u posted .
it said

"As can be seen from the formula lower voltage plays greater part in CPU consumption than frequency. By reducing the voltage the damage of overclocking can be reduced and the battery life time extended"

is this mean that when im using lv profile,i gnna damage my device n battery lifetime in d future? bcs it uses more voltage..
I experienced exactly the same stability problems with ideal settings.
What i would do in your case is try using xlv settings
(kernel-config load xlv) and change the limits as required. The voltages in xlv are lower than that of lv, so can cause stability issues as in ideal, but i found it to be alot more stable on my device.
From the wiki the voltages used at 850MHz for lv are:

54 1.275V 850 MHz

and for xlv are:

48 1.200V 850 MHz

Both these settings are still lower than the voltages at default at 600MHz anyway.
 
Gusse's Avatar
Gusse is offline Gusse
2010-06-14 , 20:03
Posts: 168 | Thanked: 206 times | Joined on Apr 2010 @ Finland
#4495
Originally Posted by matts76 View Post
What application and codes are u using to set different freqs on lock/unlock? sounds really cool.
Originally Posted by moepda View Post
all taken from here :

http://wiki.maemo.org/Overclocking#U..._.28by_Fecn.29
I have a question about this Fecn's dbus-script on Overclocking wiki page.

Dbus-script is triggered when "tklock_mode_ind locked/unlocked" has happened. Then script select suitable max frequency based on current temperature (and optionally by battery capacity).

If temperature is low during triggering time, then max frequency will be selected. If I use the phone for longer period then temperature starts to rise too high. Is there some dbus-parameter(s), which could be used for active monitoring of temperature?

I have used so far "while true/do/sleep/done" - 30sec. polling method for dynamic control of frequency based on temperature when needed (not too often, but sometimes).
Last edited by Gusse; 2010-06-14 at 20:13.
 
Jokah is offline Jokah
2010-06-14 , 22:01
Posts: 53 | Thanked: 8 times | Joined on Apr 2010 @ Switzerland
#4496
I saw a never seen before error in my dmesg today, anybody ever experienced one similar or has clue what is causing it?

[18747.280700] WMD_DEH_Notify: ********** DEVICE EXCEPTION **********
[18747.280761] WMD_DEH_Notify: DSP_SYSERROR, errInfo = 0x300
 
moepda's Avatar
moepda is offline moepda
2010-06-14 , 22:03
Posts: 334 | Thanked: 118 times | Joined on Apr 2010 @ United Kingdom
#4497
i would say adjust the temperature bands lower or closer together , i use 38c as my 1st cpu change (900mhz to 850mhz) and 48c as my last (705mhz to 600mhz)

more than that im afraid i cant help , not enough linux experience sorry...
 
imacmillan is offline imacmillan
2010-06-15 , 14:44
Posts: 111 | Thanked: 27 times | Joined on Apr 2010
#4498
Originally Posted by Gusse View Post
I have a question about this Fecn's dbus-script on Overclocking wiki page.

Dbus-script is triggered when "tklock_mode_ind locked/unlocked" has happened. Then script select suitable max frequency based on current temperature (and optionally by battery capacity).

If temperature is low during triggering time, then max frequency will be selected. If I use the phone for longer period then temperature starts to rise too high. Is there some dbus-parameter(s), which could be used for active monitoring of temperature?

I have used so far "while true/do/sleep/done" - 30sec. polling method for dynamic control of frequency based on temperature when needed (not too often, but sometimes).
This is exactly whats holding me back from using this script. Seems a little pointless as the only time the temperature will raise on my device is when it is unlocked and when i am using it heavily.

Is there any way to dynamically control the frequency as gusse said? that would be far more useful, instead of the temperature when the phone is initally unlocked, in my opinion.
 
Tigerite is offline Tigerite
2010-06-15 , 14:53
Posts: 284 | Thanked: 320 times | Joined on May 2010 @ Peterborough, UK
#4499
This is why I was trying to port cpufreqd but just couldn't get it to compile on the N900, so gave up. I'd imagine that the kernel would also need to be modified to use it properly anyway.
 
paan_fls is offline paan_fls
2010-06-15 , 15:46
Posts: 7 | Thanked: 0 times | Joined on Jun 2010
#4500
i have another question, if we r using this kernel, cn we update d phne if theres a new PR?since d old OC method will make u cnt update d phne.is it d same wif titan kernel,or im missing smthing here?

to imacmillan.thx.now im using lv profile n it works fine to me.
my battery drain a bit fast(but not dat much)
Last edited by paan_fls; 2010-06-15 at 15:50.
 
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