Re: acer-wmi is unnecessarily loaded on a Lenovo Ideapad S12

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Hi Ike, 

æ åï2011-03-03 æ 11:17 +0800ïIke Panhc æåï
> Hi,
> 
> Here[1] is the output of wmidump for ideapad s10-3 and s12-via and there is no
> WMI device of ideapad B550 and Y530.
> 
> [1] http://pastebin.ubuntu.com/574793/
> 
> For now, ideapad-laptop handles the VPC2004 devices that can be found in most of
> the ideapads (maybe all, but I can not sure). In my opinion, I do not think to
> handle WMI in ideapad-laptop is reasonable unless we have an extra function on
> ideapads and we can only control it with WMI driver.
> 

Yes, I just simply check the Ideapad S12's DSDT that was dumped by
Ville-Pekka Vaino, it also declare VPC2004 devices in EC block.

And, 
per Vaino's mail, he said ideapad-laptop handle the killswitches better
on Ideapad S12.

Did you have any plan to add the module alias for all known machines
that were support VPC2004 devices?


Thank's
Joey Lee

> On 03/03/2011 05:09 AM, Carlos Corbacho wrote:
> > On Wednesday 02 Mar 2011 08:53:55 Joey Lee wrote:
> >> æ äï2011-01-03 æ 20:49 +0000ïMatthew Garrett æåï
> >>
> >>> It looks like this GUID is present in a surprisingly wide range of
> >>> devices (eg, http://pastebin.com/8BY0Dg64 from a Vaio...), which means
> >>> that it's probably not a safe assumption that reading from the EC will
> >>> give us reasonable results. Do the Acer drivers definitely do that,
> >>> rather than there being some SMI that returns the data?
> >>
> >> The AMW0 in acer-wmi not just used by acer machines:
> >>
> >> #define AMW0_GUID1              "67C3371D-95A3-4C37-BB61-DD47B491DAAB"
> >>
> >> It was also included in Lenovo Ideapad S12 and Vaio machines' DSDT. For
> >> Lenovo Ideapad, that will be better handle by ideapad-laptop driver.
> > 
> > They might not be - Matthew's original question still stands. The old AMW0 was 
> > just a funny wrapper for direct BIOS calls - maybe we just need a different 
> > call here?
> > 
> > What does Acer do - are they poking the EC directly, or is the call to AMW0 
> > just different for these machines?
> > 
> >> Could we just direct add those model to the blacklist in acer-wmi
> >> driver? or we direct check dmi in acer-wmi for only support Acer
> >> machines that were included AMW0 in DSDT?
> > 
> > Interesting. If we can't autodetect whether it's a dummy interface or not, 
> > then, we should change acer-wmi to whitelist what it does support - Acer, 
> > Fujistu Siemens and Medion - rather than trying to blacklist every vendor that 
> > crops up.
> > 
> > -Carlos
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