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#1 2011-06-24 00:54:45

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)

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#2 2011-06-24 01:38:48

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.

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#3 2011-06-24 14:40:29

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.

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#4 2011-06-24 16:53:12

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.

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