linux-kernel - Re: Side effect of pressing special keys

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Message-Id: <201412031346.13297@pali>
Date:	Wed, 3 Dec 2014 13:46:13 +0100
From:	Pali Rohár <pali.rohar@...il.com>
To:	Pavel Machek <pavel@....cz>
Cc:	linux-input@...r.kernel.org, platform-driver-x86@...r.kernel.org,
	Gabriele Mazzotta <gabriele.mzt@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: Side effect of pressing special keys

On Wednesday 03 December 2014 13:40:42 Pavel Machek wrote:
> On Sun 2014-11-23 14:41:17, Pali Rohár wrote:
> > Hello,
> > 
> > pressing some keys on laptops could cause some side effects.
> > 
> > Example scenario 1:
> > 
> > Laptop has Fn key for enabling/disabling WIFI and when that
> > key is pressed BIOS is doing two things:
> > 
> > 1) Switch hard rfkill state of WIFI
> > 2) Report that Fn key was pressed to kernel
> > 
> >    (either via i8042 bus or via ACPI/WMI)
> 
> We should not really report that as a "key" to userspace. We
> might want to report that rfkill state changed....
> 							Pavel

Ok, and what about KEY_KBDILLUMTOGGLE when bios also handle 
keyboard backlight level? Should be this key filtered too?

-- 
Pali Rohár
pali.rohar@...il.com

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