> -----Original Message----- > From: Gabriele Mazzotta [mailto:gabriele....@gmail.com] > Sent: Wednesday, June 22, 2016 9:40 AM > To: Limonciello, Mario <mario_limoncie...@dell.com>; pali.ro...@gmail.com > Cc: mj...@srcf.ucam.org; dvh...@infradead.org; ker...@kempniu.pl; > l...@kernel.org; alex.h...@canonical.com; platform-driver- > x...@vger.kernel.org; linux-kernel@vger.kernel.org > Subject: Re: [PATCH 3/4] dell-wmi: Add information about other WMI event > codes > > On 22/06/2016 16:21, mario_limoncie...@dell.com wrote: > >> -----Original Message----- > >> From: Pali Rohár [mailto:pali.ro...@gmail.com] > >> Sent: Wednesday, June 22, 2016 9:13 AM > >> To: Limonciello, Mario <mario_limoncie...@dell.com> > >> Cc: gabriele....@gmail.com; mj...@srcf.ucam.org; > dvh...@infradead.org; > >> ker...@kempniu.pl; l...@kernel.org; alex.h...@canonical.com; > platform- > >> driver-...@vger.kernel.org; linux-kernel@vger.kernel.org > >> Subject: Re: [PATCH 3/4] dell-wmi: Add information about other WMI > event > >> codes > >> > >> On Wednesday 22 June 2016 13:40:57 mario_limoncie...@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? > >> > > > > Yeah, that's what my spec says, I haven't tested this on actual system to > see. > > > > I'm guessing what's going on is that during suspend ACPI battery drops > > off system and comes back up on resume. > > > > Maybe Gabriele can comment if any other times were noticed, but in any > > case I think it's appropriate for dell-wmi driver when receiving this on WMI > > to not do anything. Sending KEY_BATTERY would be wrong behavior. > > I think I saw the event only after resume, but I don't read my dmesg > that often to notice other special cases. Surely it's not related to > any hotkey nor actual battery removal. > > FYI I have a "battery button" and the associated code is 0xe007. I > guess most of the laptop nowadays use that code for QuickSet, given > that the entry for it was added to dell-wmi.c back in 2009.
Ah yes to make sure that's clear - that battery button is "Battery Health Meter". For QuickSet that function was for just showing a little popup with remaining battery life. For Linux I do think KEY_BATTERY is still appropriate there. > > I would also like to remind that my laptop receives four WMI events > with code 0xe00e after resume. If we send an input event for each > WMI event with code 0xe00e, I'd get four bogus button keypresses. Yep, exactly why dell-wmi should just ignore this code.
