Re: Regression: Dell XPS 13 9360 keyboard no longer works
From: Darren Hart
Date: Thu Feb 22 2018 - 14:50:16 EST
On Thu, Feb 22, 2018 at 05:05:39PM +0000, Mario.Limonciello@xxxxxxxx wrote:
...
> OK thanks for confirming. Here's what I've concluded:
>
> * So looking through the ACPI tables on the 9360 it initializes that status
> (slate vs laptop mode) bit to "slate" mode. The 9360 isn't a 2-in1- so that
> seems wrong to me, but that's what it does.
> It only gets updated based on dock status.
>
> The 9365 (which is a 2 in 1) however seems to initialize the status properly.
>
> So that's an impasse of what to do.
> It's not clear to me what is really happening:
> a) We're missing something else in this driver (eg something else that
> indicates whether to trust VGBS output)
>
> b) Mis-interpreting the results from it (we shouldn't report the switch for
> tablet mode based on what we do)
>
> c) 9360 has a BIOS bug (seems unlikely since Windows doesn't freak out and
> show virtual keyboard at wrong time)
>
> I'm leaning on it's probably <a>.
> We should check for tablet mode should only be run if chassis type
> matches 2-in-1 (chassis type 0x1F).
This sounds like a good approach to me.
> I believe that should fix the problem on the 9360, let it continue to work on
> the 9365 (and other 2-in-1's).
>
> Can you guys please test this? If that works I'll split up the routine and submit
> it.
Queueing this up as well.
--
Darren Hart
VMware Open Source Technology Center