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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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NokiaRocks is offline NokiaRocks
2010-04-11 , 16:05
Posts: 658 | Thanked: 117 times | Joined on Jan 2010
#2291
I like the idea of 500 Mhz idle with lowest possible voltage
Would really love to test it for myself.
 
Lehto is offline Lehto
2010-04-11 , 16:09
Posts: 126 | Thanked: 327 times | Joined on Nov 2009 @ Finland
#2292
Originally Posted by titan View Post
So far I'm using 3C for 1.1GHz (doesn't crash but didn't run extensive tests) and
40 for 1.2GHz (untested).

Right now I'm playing with the lower voltages for Idle, 250, 500 and 550 MHz.
stock settings are: 1E, 26, 30. 36
currently I have working: 14, 14, 1E, 21
This means I'm running 500 MHz at the voltage stock uses for Idle!

I also did
Code:
echo 500000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
to lock min to 500MHz and watch the current with
Code:
cat /sys/class/power_supply/bq27200-0/current_now
Yeah I've been using the same 1E flag for my 500mhz mode for a while now without any problem at all. The CPU seems to operate with very low voltages without any problem at all.
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My OC kernel collection
 
5796 is offline 5796
2010-04-11 , 16:16
Posts: 7 | Thanked: 0 times | Joined on Apr 2010
#2293
Hi, Everyone.

I got a problem after restore my N900 setting. SystemLanguage changed to Africa language something......... Language and regional can't load with this message pop out -----> memr_ni_application_closed_no_resources..

Please help !!!
 
titan is offline titan
2010-04-11 , 16:40
Posts: 946 | Thanked: 1,650 times | Joined on Oct 2009 @ Germany
#2294
so far [500,850] with XLV works flawlessly.
after phone calls I have to
echo 500000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
but everything else (phone calls, videos, music) works fine.
Haven't tested GPS or bluetooth yet.
 

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vjs is offline vjs
2010-04-11 , 16:43
Posts: 7 | Thanked: 3 times | Joined on Apr 2010
#2295
There seems to be a cosmetic bug in titan's XLV kernels, it reports itself as ULV kernel, not XLV kernel :-(

Linux Nokia-N900-42-11 2.6.28.10maemo-ulv-omap1 #6 PREEMPT Sun Apr 11 17:41:17 CEST 2010 armv7l unknown

Could someone confirm this, or did I just goof up my flashing?
 
arbitrabbit is offline arbitrabbit
2010-04-11 , 16:47
Posts: 171 | Thanked: 114 times | Joined on Feb 2010
#2296
Originally Posted by titan View Post
so far [500,850] with XLV works flawlessly.
after phone calls I have to
echo 500000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
but everything else (phone calls, videos, music) works fine.
Haven't tested GPS or bluetooth yet.
Yup, I have flashed your ultra low voltage firmware as well and I agree that my first impressions are that [500,850] is the way forward. Will see how it performs battery life vise but the initial results are very encouraging. CPU is in idle for much longer now.

Lehto, presumably your hard coded kernel doesn't revert back to 250MHz after each call?
Last edited by arbitrabbit; 2010-04-11 at 16:50.
 
titan is offline titan
2010-04-11 , 16:48
Posts: 946 | Thanked: 1,650 times | Joined on Oct 2009 @ Germany
#2297
Originally Posted by vjs View Post
There seems to be a cosmetic bug in titan's XLV kernels, it reports itself as ULV kernel, not XLV kernel :-(
yes, correct and about to be fixed.
I'm also uploading an "ideal" kernel with the same XLV voltages but 500 as minimum
and [500,850] as defaults.
 

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debernardis is offline debernardis
2010-04-11 , 16:51
Posts: 2,142 | Thanked: 2,054 times | Joined on Dec 2006 @ Sicily
#2298
Originally Posted by titan View Post
so far [500,850] with XLV works flawlessly.
after phone calls I have to
echo 500000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
but everything else (phone calls, videos, music) works fine.
Haven't tested GPS or bluetooth yet.
Running XLV 500-850 as adviced.
GPS by Sygic is OK
BT is OK both receiving and transmitting files.
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Ernesto de Bernardis
 
TheThane is offline TheThane
2010-04-11 , 16:57
Posts: 42 | Thanked: 7 times | Joined on Nov 2009
#2299
Originally Posted by titan View Post
I've made my extremly low voltage (XLV) kernels available
http://wiki.maemo.org/Overclocking#I...mental_kernels
Very good work
 
arbitrabbit is offline arbitrabbit
2010-04-11 , 16:58
Posts: 171 | Thanked: 114 times | Joined on Feb 2010
#2300
Originally Posted by titan View Post
yes, correct and about to be fixed.
I'm also uploading an "ideal" kernel with the same XLV voltages but 500 as minimum
and [500,850] as defaults.
I don't understand this. Isn't clock speed outside the kernel in your case, to be set in /etc/pmconfig? So what are you changing in Kernel for that? Are you changing the 500 voltage to <idle?
 
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