Re: Resume -> higher power drain?

[Pavel Machek <pavel-+ZI9xUNit7I@public.gmane.org>]

Hi!

> >>>Also, does the bus master activity rates typically seen (check 
> >>>/proc/acpi/processor/*/power every once in a while) differ
> >>>between pre-suspend and post-suspend?
> > This again is interesting!
> > What does this bus master activity indicate?
> > 
> > Before suspend I see the CPU sporadically changing from C2 to C3 and
> > back and bus master activity to have values between 00000000 and some
> > higher values on activity, like 00200000 or even f0000000.
> > 
> > After suspend/resume this changed!
> > The CPU is now fixed at C2 and does not switch between C2 and C3.
> > Also the bus master activity is ffffffff in idle state and changes to
> > strange values on activity, like f7ffffff - quite different than before.
> 
> OK, just fixed this ;)
> 
> The problem seemed to be related to suspend/resume scripts, so to say. I
> did enable vbetool to save/restore VESA state and doing vbetool post.
> 
> Using s3_bios resume this is not necessary!
> 
> And after disabling vbetool usage at all the bus master activity is back
> to normal again after resume!
> 
> So at least for my T42p I can recommend NOT to use vbetool at all for
> suspend/resume but rather to use s3_bios!

Can you suggest a patch to Documentation/power/video.txt?
								Pavel

-- 
Boycott Kodak -- for their patent abuse against Java.


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