Laptop improvement

[Dave Jones]

On Wed, Oct 11, 2006 at 07:53:03PM +0200, Jindrich Novy wrote:
 > Hi,
 > 
 > I'm forwarding you an email from Martin Sebesta related to IBM T60
 > laptop issue:
 > 
 > > > I am using IBM T60 with FC5. When i switch to batteries, my fan
 > starts
 > > > > to operate on higher speed (i hear it) than usual, draining my battery
 > > > > totally empty in less than 2 hours.
 > > > > As i have installed Windows with VMware with FC 5 in it on the same
 > > > > maschine, i tried to work in FC on Windows. The battery lasted for more
 > > > > than 5 hours. 
 > > > > In each case the battery was fully loaded on the beginning.
 > > > > 
 > > > > Perhaps a tip for power-management improvement...
 > 
 > Any help is appreciated. I have to mention I see similar behavior
 > of my HP laptop when it's resurrected from software suspend sometimes
 > even on FC6. CPU load is at 100% immediately after waking the laptop up.
 > Did anyone from you experience similar problems? Is there known
 > any workaround?

Finding out what its doing is the first step.

1- is it stuck in userspace? (top)
2- is the kernel really busy? (boot with profile=1, and run readprofile, or
   use oprofile)
3- does /proc/interrupts show an interrupt arriving at a ridiculously high rate?

Without data, we're just arm-waving.

	Dave

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