Re: [PATCH 3/4] dell-wmi: Add information about other WMI event codes

Pali Rohár
2016-06-22T14:12:55Z

On Wednesday 22 June 2016 13:40:57 Mario_Limonciello@Dell.com wrote:
> > > You aren't seeing this on the DSDT of your Latitude right?
> >
> > Yes, I do not see it on Latitude.
>
> Thanks, the usage of this scan code is specific to consumer BIOSes.
>
> >
> > > Gabriele,
> > >
> > > Your machine is from the year before XPS switched over to running the
> > > Dell business client (eg Latitude, Precision, Optiplex) BIOS.
> > >
> > > The EC in that machine does have support for "Battery Health" via that
> > > scancode. On Windows it's used for relaying battery information to an
> > > application called Quick Set.
> >
> > Do you have some details when it is send to OS? And how to read that that
> > "battery health"?
>
> When a battery is removed or inserted this event is supposed to be received
> by quickset over WMI and then Quickset will re-read battery information.

So event is sent only if battery is removed or inserted?

> For Linux I don’t think this is necessary and a NOOP is appropriate.
>
> There is also a second place that some older laptops had a battery "hotkey"
> that would also emit 0xE00E. This was also picked up by quickset and would
> show battery information.
>
> This shouldn't be blocked by kernel, I'd expect if someone wants to bind this
> to another application from userspace they should be able to.

Great! Can I send patch after which 0xe00e will be send to input layer as
event KEY_BATTERY?

--
Pali Rohár
pali.rohar@gmail.com