Re: [PATCH] acer-wmi: check wireless capability on AMW0_GUID2 machines

[joeyli <jlee@suse.com>]

於 四，2012-01-12 於 00:54 +0800，Ike Panhc 提到：
> On 01/11/2012 12:26 PM, joeyli wrote:
> > 於 一，2012-01-09 於 22:15 +0000，Carlos Corbacho 提到：
> >> On Monday 09 Jan 2012 18:00:24 joeyli wrote:
> >>> I just checked and found I also have no AMW0_GUID2 machines on my hand,
> >>> now.
> >>> I have some questions about AMW0_GUID2:
> >>>
> >>>   + Why we enabled wireless capability in acer-wim if a non-acer machine has
> >>> AMW0_GUID2 ?
> >>
> >> IIRC, there were some bug reports on non-Acer hardware (I don't think this 
> >> involved Acer hardware, but this was some time ago...) where the wireless 
> >> detection wasn't working with this, but if we forced it on, it worked fine.
> >>
> > 
> > Yes, in acer-wmi supported some non-acer machine by quirk and read EC
> > register. That means we need find out EC register reflect to wifi RF
> > state if we are lucky.
> > 
> > Unfortunately, direct enable wireless capability causes some non-acer
> > machines' wireless rfkill always disabled. e.g. Lenovo E520
> > 
> > https://bugzilla.redhat.com/show_bug.cgi?id=674353 
> > 
> > If we don't check the wireless capability, then they need manually add
> > acer-wmi to backlist. On some lenovo machines, ideapad-laptop driver
> > should support by lenovo's ACPI method.
> > 
> 
> I've got two reports which says after poking the ec register, the phy0 rfkill reports hard blocked by mistake. And few hours ago I get the third report says the similar issue. I will summary the report.
> 

Please give more detail information (DSDT, EC register dump...), if
poking the ec register can block rfkill, means the AMW0_GUID1 works on
this machine, maybe we can try to find out which EC register reflect to
wireless.

> I am thinking about alternative way
> 
> Since we have thinkpad_acpi and ideapad_laptop, both of them have rfkill capability. If there is VPC2004/IBM0068/LEN0068 in DSDT, then it will be fine if we do not register rfkill in acer-wmi.
> 
> Any thought?
> 

Yes, it's possible a solution. If you can make sure lenovo machines have
VPC2004/IBM0068/LEN0068 in DSDT, then I will generate a patch to
acer-wmi.


Thanks
Joey Lee