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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Posts: 59 | Thanked: 7 times | Joined on Jan 2010
#1791
Originally Posted by Lehto View Post
No need to make new kernel files, just edit the /etc/pmconfig so the part which says scaling_min_freq 125000 to scaling_min_freq 250000
and how do i change it, can you please give me instructions
 
Posts: 1,751 | Thanked: 844 times | Joined on Feb 2010 @ Sweden
#1792
Originally Posted by dimkit View Post
and how do i change it, can you please give me instructions
In x-terminal:
Code:
root (need rootsh installed)
leafpad /etc/pmconfig (need leafpad installed)
 
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Posts: 500 | Thanked: 437 times | Joined on Nov 2009 @ Oklahoma
#1793
Originally Posted by titan View Post
There is a new stable overclockable kernel in extras-testing (version 2.6.28-maemo19, not 18!!).
Installation is very simple: install the package kernel-flasher-maemo (section system in HAM), shutdown and cold boot. There's no need for reflashing etc.
It requires firmware PR1.1 or newer.

The default limit is at stable 600MHz. This is the same setting as the stock kernel and is safe.

This kernel makes it possible dynamically change the maximum frequency up to 1.2GHz (supported frequencies are 250,500,550,600,700,750,800,850,900,950,1000,1100, 1200MHz)
WARNING: Overclocking may damage your device and is at your own risk! It may void your warranty and destroy your data. You have been warned.
You can manually increase the limit until your device fries using, e.g. for 600MHz
Code:
sudo gainroot
echo 600000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
The last line shows which value was actually set.
This setting takes effect immediately and is cleared with the next reboot or overriden by
every phone call with the value 600MHz.
To permanently fix a limit you found to be stable edit the scaling_max_freq setting in /etc/pmconfig (e.g., using vi)
and either install the new kernel http://talk.maemo.org/showpost.php?p...postcount=1765
or implement the workaround http://talk.maemo.org/showpost.php?p...postcount=1722
WARNING: Permanent overclocking is very dangerous!

Apart from overclocking, this kernel has a lot of other features
(2.6.28.10, PR1.2 SDK patches etc) see http://talk.maemo.org/showthread.php?t=43420
It also retains the version info in Settings -> Product info (if it is still available).
If it works well for you, please vote at
http://maemo.org/packages/package_in....6.28-maemo19/

For deinstallation of this kernel run
Code:
sudo gainroot
apt-get install --reinstall kernel kernel-flasher
apt-get remove kernel-maemo kernel-modules-maemo
PS: 125MHz is deliberately not included, see http://talk.maemo.org/showpost.php?p...&postcount=141

Good luck!
I used this method to overclock to 750MHz. After about six minutes of normal use the device spontaneously re-booted. I was running the speedtest.net application in the standard browser at the time of the reboot. I was thinking that 750MHz was a fairly conservative amount (25% of stock maximum) of overclocking. Apparently my device had other ideas. 750MHz was confirmed by Conky prior to the reboot. I knew there was a chance I had a "superchip" that would take 1GHz and I knew there was a chance I had a wimpy chip that was lucky to survive 600MHz. Looks like mine fell into the bottom of the range.

Thanks, and this is sincere, for the excellent information about overclocking. I never would have attempted this without this sort of help.
 
Posts: 59 | Thanked: 7 times | Joined on Jan 2010
#1794
Originally Posted by AlMehdi View Post
In x-terminal:
Code:
root (need rootsh installed)
leafpad /etc/pmconfig (need leafpad installed)
Thanks you all , all runs very smooth now
 
Posts: 25 | Thanked: 4 times | Joined on Mar 2010
#1795
i've already walked into a problem with overclocking the n900.
i'm not really sure it's due to running it @ 900mhz but it is anoying.

http://talk.maemo.org/showthread.php?t=49431

the microsd card kept getting unreachable from within the N900, worked fine on the pc though.
 

The Following User Says Thank You to oddish2211 For This Useful Post:
Posts: 102 | Thanked: 9 times | Joined on Feb 2010 @ Wellingborough, UK
#1796
Had mine overclocked for about a week now, with Letho's 125-800mhz file. Battery drains quite fast to be honest, it is rather annoying, going to reflash to stock.

Edit:

It is quicker, flash videos only stutter in the first 10 seconds then stablise to fast, that's in browser, when before it used to be so stuttery and even in full screen it was shitty, so that's a plus point I suppose, it would be nice to be able to set the max processor speeds, I'm guessing that's already been done as this post has been out for a little while now, but until I can be botherd to search through it atm lol.

It's really simple to flash too, which was a plus

Ryan

Last edited by RDK; 2010-04-08 at 19:16.
 

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Posts: 946 | Thanked: 1,650 times | Joined on Oct 2009 @ Germany
#1797
Originally Posted by titan View Post
just realized that it's a catch22
If the kernel should ignore the default 125000 in pmconfig it would also
ignore the reset by the telephone app.
I'll try another workaround for the minimum.
unfortunately it's not possible to fix the minimum at 125MHz after phone calls
while at the same time ignoring the default 125MHz in pmconfig.
so I'll revert to a minimum of 250Mhz in the kernel.
Many people have problems with 125Mhz, anyway.
 

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Posts: 13 | Thanked: 10 times | Joined on Apr 2010 @ Stockholm
#1798
Originally Posted by oddish2211 View Post
the microsd card kept getting unreachable from within the N900, worked fine on the pc though.
I forgot this once, you probably didn't But did you by any chance had it connected with usb cable to the pc as mass storage device at the time? (if so n900 umounts the cards)

Edit: Sorry, was a little hasty. Your problem seems different.

Last edited by _privateMember; 2010-04-08 at 19:30.
 
Posts: 946 | Thanked: 1,650 times | Joined on Oct 2009 @ Germany
#1799
Originally Posted by moerderameise View Post
Am i wrong or is ot the third time you post exactly this? once you wrote in spain or something like that. I definately find its SPAMMING! As you can often enough see moste people read all missed posts since their last visit, so i'm sure you don't have to post it all few minutes.... sorry, but thats bumping this threat more up than necessary (i know, this post too, but had to say it)
yes, stalkers like that, who are not even willing to read some relevant posts in the thread should be ignored...
 

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Posts: 68 | Thanked: 4 times | Joined on Feb 2010
#1800
Originally Posted by Lehto View Post
No need to make new kernel files, just edit the /etc/pmconfig so the part which says scaling_min_freq 125000 to scaling_min_freq 250000
@Lehto - Can I do the same change for the 900 Mhz with 500 DSP? I believe It will work. I just want to make sure, because right now I am using Titan's verson, and plan to test your version of 900 Mhz with 500 DSP next. Thanks.
 
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