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Topic: linux-phc - undervolting patch for kernel in DSLN?

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ruserious

Group: Members
Posts: 23
Joined: Dec. 2005

Posted: April 08 2007,21:36

Hi there,

i was wondering, if there is any chance that the linux-phc patch can make it's way into DSL-N? I like to use DSL-N from a usb stick on my notebook when surfing, since I can power off the hdd and enjoy complete noiselesness. This would be even nicer if I could undervolt my Pentium M 740. On Ubuntu (which is the main OS), I have a custom kernel with linux-phc patch and the temperature is around 7-8 °C lower with undervolting, which makes quite a difference with respect to how often (or rather if at all) the fan runs.

It's a relatively small patch, too:
https://www.dedigentoo.org/trac/linux-phc/

If that's not an option - where can I start reading on how to use my custom kernel with DSL-N?

Juanito

Group: Members
Posts: 1601
Joined: Sep. 2005

Posted: April 09 2007,03:45

According to the link you supplied, the oldest kernel patched is 2.6.15 - DSL-N is 2.6.12 so it's not obvious that this patch would work.

Have you tried cpufreqd - extension in the DSL-N repository - this will slow the cpu down and thus use the fan less. The cpufreq_combo extension also contains laptop-mode-tools which will power down your hd automatically.

You could try reading these posts (albeit for DSL) for ideas on how to patch the DSL-N kernel - dummy compile, patching 2.4.26 for cpufreqd

ruserious

Group: Members
Posts: 23
Joined: Dec. 2005

Posted: April 09 2007,10:15

Quote (Juanito @ April 08 2007,23:45)

Quote

DSL-N is 2.6.12

Oops, I totally missed this critical piece of information.

Quote

Have you tried cpufreqd - extension in the DSL-N repository - this will slow the cpu down and thus use the fan less. The cpufreq_combo extension also contains laptop-mode-tools which will power down your hd automatically.

Those are all great, and indeed they help a lot in achieving the desired goal.
(Though ability to undervolt would still be a nice feature, in case DSL-N does future kernel upgrades)

Thanks for the links, I will take a look.

^thehatsrule^ Offline

Group: Members
Posts: 3275
Joined: July 2006

Posted: April 09 2007,13:24

Re: undervolting:
Can't you manually set the voltage in the BIOS? Unless you need changing on-the-fly this should be "good enough"...

ruserious

Group: Members
Posts: 23
Joined: Dec. 2005

Posted: April 10 2007,14:17

Quote (^thehatsrule^ @ April 09 2007,09:24)

Re: undervolting:
Can't you manually set the voltage in the BIOS? Unless you need changing on-the-fly this should be "good enough"...

No, I can't. I am not aware of any Notebooks where that is possible, but then I haven't seen all that many notebook BIOS menus... ;)

4 replies since April 08 2007,21:36

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