Re: [Haifux] ACPI on IBM R40

2005-05-06 Thread Baruch Even
Mark Silberstein wrote:
Hi,
If anyone knows what can be done to make ACPI not draining battery when
in the suspend-to-RAM, I would be very much obliged.
Suspend to ram will always drain batteries since the ram requires energy 
to be kept alive.

Maybe you want suspend to disk?
Baruch
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Re: [Haifux] ACPI on IBM R40

2005-05-06 Thread Mark Silberstein
Thanks for prompt reply.
I should have stressed that I'm talking about UNUSUAL draining - as
opposed to APM sleep I used in 2.4. My battery is over in 10 hours,
while previously it was at least 4-5 days.

Suspend to disk is a good idea, but it doesn't really work for my
Radeon7500 video card, i.e. it suspends, but comes back with garbaged
display, impossible to see anything.


On Fri, 2005-05-06 at 15:38 +0100, Baruch Even wrote:
 Mark Silberstein wrote:
  Hi,
  
  If anyone knows what can be done to make ACPI not draining battery when
  in the suspend-to-RAM, I would be very much obliged.
 
 Suspend to ram will always drain batteries since the ram requires energy 
 to be kept alive.
 
 Maybe you want suspend to disk?
 
 Baruch


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Re: [Haifux] ACPI on IBM R40

2005-05-06 Thread Baruch Even
Mark Silberstein wrote:
Thanks for prompt reply.
I should have stressed that I'm talking about UNUSUAL draining - as
opposed to APM sleep I used in 2.4. My battery is over in 10 hours,
while previously it was at least 4-5 days.
You might want to look in Google regarding the sleep mode you can put 
the machine into and how.

CPUs have several sleep modes, some are better at saving energy than 
others, though I know no details on this more than that.

Maybe some other learned Kernel hacker will know more, I've been dealing 
too much with networking and too little with other areas.

Baruch
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Re: [Haifux] ACPI on IBM R40

2005-05-06 Thread Muli Ben-Yehuda
On Fri, May 06, 2005 at 06:15:03PM +0300, Mark Silberstein wrote:

 Suspend to disk is a good idea, but it doesn't really work for my
 Radeon7500 video card, i.e. it suspends, but comes back with garbaged
 display, impossible to see anything.

Can't help you with the ACPI problem (I've been trying to steer clear
of it for years now and am still in apm land) but switching to a text
console before suspending might do the trick, using e.g. chvt(1). 

Cheers,
Muli
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Muli Ben-Yehuda
http://www.mulix.org | http://mulix.livejournal.com/


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