Excessive S3 battery drain on R32

Excessive S3 battery drain on R32

[Brian Perkins]

I've noticed that my R32 using S3 last only about 9 hours on a full 
battery using S3.  This should be more like 24 hours.

It seems that the problem is at least in part caused by X. Some 
preliminary testing (suspend, wait half an hour, repeat) indicated that 
booting into single user mode and suspending drained at a more 
appropriate rate.  Then, starting X by hand, then suspending seemed to 
cause the drain to go up.

   The card is a Radeon Mobility M6, but the radeon kernel driver isn't 
being used, as DRI is broken in fedora core's stock XFree.  Is this 
problem a relative of the S3 Radeon initialization bugs that people have?


-- 
Yes, but will it wash my dishes?
Brian Perkins                bperkins-ooduxAEi7gVg9hUCZPvPmw@public.gmane.org



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RE: Excessive S3 battery drain on R32

[Yu, Luming]

>I've noticed that my R32 using S3 last only about 9 hours on a full 
>battery using S3.  This should be more like 24 hours.

How do you know this should be more like 24 hrs?

>It seems that the problem is at least in part caused by X. Some 
>preliminary testing (suspend, wait half an hour, repeat) indicated that 
>booting into single user mode and suspending drained at a more 
>appropriate rate.  Then, starting X by hand, then suspending seemed to 
>cause the drain to go up.

How long did your battery can last if suspend in single user mode?

>   The card is a Radeon Mobility M6, but the radeon kernel driver isn't 
>being used, as DRI is broken in fedora core's stock XFree.  Is this 
>problem a relative of the S3 Radeon initialization bugs that people have?

Maybe some devices haven't been in proper D state. Could you figure out which one?



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Re: Excessive S3 battery drain on R32

[Brian Perkins]

Yu, Luming wrote:

> How do you know this should be more like 24 hrs?

That's what it gets using apm and what it got under windows. (some time ago)

> How long did your battery can last if suspend in single user mode?

I just had it sleep for about 9 hours and   at that rate it would have 
drained in 24 hours.  This is a bit faster than I remember in the past, 
but much better than 9-12 hours.  Batteries do go bad after all.

> Maybe some devices haven't been in proper D state. 
> Could you figure out which one?

I'll look into this. Any hints on what to look for?



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RE: Excessive S3 battery drain on R32

[Yu, Luming]

>I'll look into this. Any hints on what to look for?
Thanks, first is try patch filed at http://bugzilla.kernel.org/show_bug.cgi?id=1618



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