Arch Linux

bwat47

Member

Registered: 2009-10-07

Posts: 638

[SOLVED] Powersaving Questions

I am in the process of optmimizing my laptop for optmimal power usage on arch. I've installed powertop and there only seems to be a few more issues left:

   Bad           VM writeback timeout                                     
   Bad           NMI watchdog should be turned off

I wasn't able to find much about these settings on the wiki. Is there a way I can have these tweaked to more optimal settings when on battery?

Last edited by bwat47 (2011-06-24 14:40:59)

thisoldman

Member

From: Pittsburgh

Registered: 2009-04-25

Posts: 1,172

Re: [SOLVED] Powersaving Questions

Googling comes up with these:

An explanation of the NMI watchdog is at http://www.mjmwired.net/kernel/Document … tchdog.txt.

I found an explanation of VM writeback time at http://www.lesswatts.org/tips/disks.php.

bwat47

Member

Registered: 2009-10-07

Posts: 638

Re: [SOLVED] Powersaving Questions

Thanks, after reading about NMI watchdog in more detail it doesn't sound like something I need at all, so I disabled it on my grub kernel line.

Manged to find the setting in laptop-mode to increase the writeback time on battery as well.

Tzbob

Member

From: Belgium

Registered: 2011-04-12

Posts: 61

Re: [SOLVED] Powersaving Questions

These may come in handy;

The powermanagement settings I run at startup - http://pastie.org/2116887

Currently not setting the pci slots on auto, my usb3 ports don't seem to co-operate well with it.

http://www.lesswatts.org/tips/ is a good source of information.