How does one go about Undervolting a laptop in Linux?

[AreonEpta]

I'd like to do an undervolt and benchmark on my laptop in Ubuntu. Any ideas? Preferably software based, with as little BIOS flashing as possible. Thanks in advance.

[Whiffle]

Good place to start... what kind of laptop.

[AreonEpta]

My bad. I'm usually good about that kind of thing...

HP DV5-1000US

Intel Core 2 Duo P7350
-1066 MHZ FSB
-3 MB L2 Cache
-2 GHz

4 Gigs of DDR2 800
-assuming 5/5/5/15

Centrino 2 Chipset
-G45 graphics
-Intel HDA sound

Broadcom 4328 a/b/g/n



I know, you didn't need all that; I'm just showing off. Did I mention I got it for $750? :lolflag:

[jocko]

Check this thread (http://ubuntuforums.org/showthread.php?t=786402).

[swoody]

I don't mean to hijack your thread Areon, but does anyone know if you can undervolt/underclock a Celeron M processor?

[AreonEpta]

I don't mean to hijack your thread Areon, but...
That's like saying, "I don't mean to insult you, but you're really fat." It's a not-so-subtle way to scapegoat out of something potentially rude. ;)

In this case, I don't care. I do believe that regardless of the kind of processor you get, you can mess with the clock speed. In Winders, I was very familiar with it. It's only in Linux that I need some help. As far as Winders is concerned, you can do anything to any processor. Linux, I dunno.

Check this thread (http://ubuntuforums.org/showthread.php?t=786402).
I followed the directions, and I ended up losing ground. My CPU power save util ended up going moot on me after following directions; on top of that, I also got an error message saying that clock speed management ain't gonna work that way, and that maybe I had misconfigured something. A quick restore of the backup I made and all was well. Any other ideas?

[swoody]

That's like saying, "I don't mean to insult you, but you're really fat." It's a not-so-subtle way to scapegoat out of something potentially rude. ;)

I really wasn't meaning to butt-in, but I didn't want to start a new thread for a quick question like that when you had started a similar thread already.

Also, after some further investigations, I've found that you cannot underclock/volt a Celeron M, or at least it's impossible according to the guy who owns?/runs?/created?? rmclock. The Celeron doesn't have the speedstep technology, so it is impossible to play around with it :(

[AreonEpta]

The Celeron doesn't have the speedstep technology, so it is impossible to play around with it :(

That makes sense, considering it's supposed to be a low-end processor line. Sorry about the disappointment, I was hoping that the newer ones had speedstep, but, guess not. sadface.

Any other ideas [on how to underclock my laptop and make it work]?

[jjpcexpert]

Getting nowhere with battery life here. Tried everything I could to undervolt, and it just coded itself to go crazy, cannot enable Direct Transitions, I'm about to melt my computer (having first taken out the HDD) and buy a new PC, or find out if the CPU can be replaced on the poor Toshiba Satellite L300D-242. Bang.