linux-phc - undervolting patch for kernel in DSLN?
Topic: linux-phc - undervolting patch for kernel in DSLN?
started by: ruserious
Posted by ruserious on April 08 2007,21:36Hi 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?
Posted by Juanito on April 09 2007,03:45According 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 >
Posted by ruserious on April 09 2007,10:15
Oops, I totally missed this critical piece of information.
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.
Posted by ^thehatsrule^ on April 09 2007,13:24Re: undervolting:
Can't you manually set the voltage in the BIOS? Unless you need changing on-the-fly this should be "good enough"...
Posted by ruserious on April 10 2007,14:17
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... ;)