linux-kernel - Ghost Lid switch on Baytrail tablet

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Message-ID: <1437266568.3512.10.camel@hadess.net>
Date:	Sun, 19 Jul 2015 02:42:48 +0200
From:	Bastien Nocera <hadess@...ess.net>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Len Brown <lenb@...nel.org>, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc:	"dev@...utier.fr" <dev@...utier.fr>
Subject: Ghost Lid switch on Baytrail tablet

Hey,

This tablet:
http://www.amazon.com/WinBook-10-1-Inch-Windows-full-size-Display/dp/B00N9ZG5U2/
doesn't have a physical lid switch unless you plug the keyboard accessory to it.

But it thinks that there is a lid, and that it's closed, making logind
suspend the machine after about 30 seconds.

I'm currently testing this on a 4.0 kernel, as there have been
regressions on Baytrail with 4.1 and 4.2rcs.

The DSDT for that tablet:
https://people.gnome.org/~hadess/Winbook%20TW100%20DSDT.dsl

Any ideas how to handle this sort of device?

Cheers
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