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

[Ike Panhc <ike.pan@canonical.com>]

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.

On 03/03/2011 05:09 AM, Carlos Corbacho wrote:
> On Wednesday 02 Mar 2011 08:53:55 Joey Lee wrote:
>> 於 一，2011-01-03 於 20:49 +0000，Matthew Garrett 提到：
>>
>>> 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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