[linux-audio-user] Re: power down

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On Wed, 2005-03-02 at 13:24 +0100, COCHARD Yves wrote:
> >
> >
> >>Hi all
> >>I realise this is not the place to ask such a question but rather than 
> >>subscribing to yet another forum I ask first just in case.
> >>I have demudi working now, all except it turning the machine off. It 
> >>goes to shut down the last line on the screen is Power Down but then it 
> >>just sits there. I have to physically turn it off.
> >>any ideas?
> >>    
> >>
> >
> >I'm experiencing the exact same thing with Mandrake's "multimedia"
> >kernels. I haven't been bothered enough by it to try and fix it, but if
> >you find an easy fix, please let me know. =)
> >
> >  
> >
> 
> Hi, I could fix this stuff by adding "apm=off acpi=force" in my 
> grub.conf file. (someting like that: "kernel 
> /vmlinuz-2.6.10-2.1.ll.rhfc3.ccrma ro root=LABEL=/1 rhgb quiet apm=off 
> acpi=force")
> This works for me but I know that it didn't for some others. Hmm.. now 
> that I know that it could cost some latency ms, I might not use that 
> anymore...
> 

I believe the big ACPI latency bug was fixed in 2.6.10.  So that kernel
should not be affected.

Of course if your hardware has a buggy ACPI implementation you will have
latency problems regardless of the OS or kernel you use, and whether
ACPI is enabled.  This is a separate issue.

It looks like Acer laptops are particularly bad, they all seem to suffer
from the ACPI/SMM issue.

Lee


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