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titan is offline titan
2010-04-06 , 14:00
Posts: 946 | Thanked: 1,650 times | Joined on Oct 2009 @ Germany
#141
Originally Posted by hawaii View Post
If you're including the entire range up to 1GHz and putting the default ceiling at 600MHz, I see no reason why you don't include 125MHz and lock it out using /etc/pmconfig - then those of us who appreciate your work with the patches, can still use the kernel and modify the scalable minimum frequency on our own and deal with the supposed instability.
EDIT: read http://wiki.maemo.org/Overclocking

The main reasons why I didn't include 125MHz yet:
* by default the kernel should run with the standard 250-600MHz range
but due to bug https://bugs.maemo.org/show_bug.cgi?id=7116
it would automatically switch to 125-600MHz.
* the power saving by activating 125MHz are not yet confirmed but Nokia disabled it due to instabilities
* with 125MHz enabled I noticed that the device spend most of the time at 600MHz:
http://talk.maemo.org/showpost.php?p...&postcount=156

I have, however, uploaded an experimental kernel with 125MHz to
link removed
EDIT: read http://talk.maemo.org/showpost.php?p...postcount=1890
Last edited by titan; 2010-04-18 at 21:32. Reason: weird behavior, workaround
 

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Matan is offline Matan
2010-04-06 , 14:04
Posts: 1,224 | Thanked: 1,763 times | Joined on Jul 2007
#142
You can set the minimum to 250 in the source, in the same way that you set the maximum to 600.

If you enable 125 by replacing the 0 in the second line, rather than the 250 in the third line, it uses lower voltage than 250, so should gain a lot in situations where the cpu runs constantly at the low frequency (mp3 playing, for example).
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titan is offline titan
2010-04-06 , 14:10
Posts: 946 | Thanked: 1,650 times | Joined on Oct 2009 @ Germany
#143
Originally Posted by Matan View Post
You can set the minimum to 250 in the source, in the same way that you set the maximum to 600.
that's what I did http://maemory.com/N900/overclock/overclock.diff
but the bug in pmconfig always overrides it for normal users (note: kernel-flasher-maemo is meant for regular users)
 

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michalurban is offline michalurban
2010-04-06 , 14:24
Posts: 202 | Thanked: 30 times | Joined on Mar 2010 @ CZE
#144
Originally Posted by titan View Post
The main reasons why I didn't include 125MHz yet:
* by default the kernel should run with the standard 250-600MHz range
but due to bug https://bugs.maemo.org/show_bug.cgi?id=7116
it would automatically switch to 125-600MHz.
* the power saving by activating 125MHz are not yet confirmed but Nokia disabled it due to instabilities

I have, however, uploaded an experimental kernel with 125MHz to http://maemory.com/N900/overclock/
Ive just tried to instal your experimantal kernel but ended up with dependency error ... Could you please post your experimental kernel starting at 125mhz as a kernel image file for flasher?
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Titans kernel up-and-running, N900 PR1.2 @ XLV 250-900 (Overclocking Guide)
 
titan is offline titan
2010-04-06 , 14:34
Posts: 946 | Thanked: 1,650 times | Joined on Oct 2009 @ Germany
#145
Originally Posted by michalurban View Post
Ive just tried to instal your experimantal kernel but ended up with dependency error ... Could you please post your experimental kernel starting at 125mhz as a kernel image file for flasher?
what was the dependency error? the image file without modules would not work.
use the instructions in http://talk.maemo.org/showpost.php?p...&postcount=141
 
deed is offline deed
2010-04-06 , 15:58
Posts: 38 | Thanked: 18 times | Joined on Apr 2010
#146
Hi titan,
thanks for the work with the kernel. I've been trying to install your custom kernel following your instructions, but the dpkg -i kernel-flasher-maemo_2.6.28-maemo20_armel.deb give me an error about pre-dependency problem: softupd installed is 0.3.3+0m5 but >= 0.4.0 is needed. error were encountered, not installed kernel flasher...
So I'm here in front of Xterm, don't know exactly what to do, and don't dare to reboot at this stage because the kernel and modules have already been installed!
Infos would be very welcome!
thanks
 
titan is offline titan
2010-04-06 , 16:05
Posts: 946 | Thanked: 1,650 times | Joined on Oct 2009 @ Germany
#147
Originally Posted by deed View Post
Hi titan,
thanks for the work with the kernel. I've been trying to install your custom kernel following your instructions, but the dpkg -i kernel-flasher-maemo_2.6.28-maemo20_armel.deb give me an error about pre-dependency problem: softupd installed is 0.3.3+0m5 but >= 0.4.0 is needed. error were encountered, not installed kernel flasher...
So I'm here in front of Xterm, don't know exactly what to do, and don't dare to reboot at this stage because the kernel and modules have already been installed!
Infos would be very welcome!
thanks
it seems that you have a firmware older than PR1.1.
don't worry about rebooting. the custom kernel can coexist with the stock kernel.
 

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deed is offline deed
2010-04-06 , 16:10
Posts: 38 | Thanked: 18 times | Joined on Apr 2010
#148
yes I still have the 1.0 (with not even one probleme) so do you think I can remove (dpkg -r) your kernel and modules, then reflash the Zimage I used just before?
By the way, no possibilities to run your kernel with PR 1.0 (ie changing this softupd?)
Thanks
 
titan is offline titan
2010-04-06 , 16:15
Posts: 946 | Thanked: 1,650 times | Joined on Oct 2009 @ Germany
#149
Originally Posted by deed View Post
yes I still have the 1.0 (with not even one probleme) so do you think I can remove (dpkg -r) your kernel and modules, then reflash the Zimage I used just before?
By the way, no possibilities to run your kernel with PR 1.0 (ie changing this softupd?)
Thanks
yes, you can remove the packages kernel-maemo and kernel-modules-maemo.
no, PR1.1 or later kernels require also more recent firmware binaries. sorry.
overclocking is much more dangerous than upgrading the firmware...
 
deed is offline deed
2010-04-06 , 16:21
Posts: 38 | Thanked: 18 times | Joined on Apr 2010
#150
Thank you for the help!
I understand your message about upgrading!, by the way my n900 was rock solid since I've got it (end november) and I did not want to face all the probs that a lot seems to have encountered after firm upgrade...
In other hand, I've been running Letho's kernel (950/500) since it was out 3 days ago and encountered zero problems with it; I just wanted to take the advantages of your modified one!
Anyway, thanks so much
 
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