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Date: Thu, 21 Aug 2003 14:48:54 +0100
From: Jamie Lokier <jamie@shareable.org>
To: "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>
Cc: Andries Brouwer <aebr@win.tue.nl>, Vojtech Pavlik <vojtech@suse.cz>,
       Neil Brown <neilb@cse.unsw.edu.au>, linux-kernel@vger.kernel.org
Subject: Re: Input issues - key down with no key up
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References: <20030819194814.A2179@pclin040.win.tue.nl> <Pine.GSO.3.96.1030821125736.2489B-100000@delta.ds2.pg.gda.pl>
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Maciej W. Rozycki wrote:
> > My laptop has function buttons that bring me to a setup menu where
> > I can set various timeouts related to power saving. These built-in
> > menus react to translated scancode Set 2 only. There is no way to get
> > out if one first chooses Set 3.

Perhaps the BIOS is listening for translated set 2 scancodes.  Maybe some
different keys would have the power saving functions in other modes?

>  Actually the spec is a standard and standard hardware performs as
> expected (e.g. hardware released by IBM).  The rest is non-standard and if
> a manufacturer claims PS/2-compliance for any of these items, then he
> lies. 

The user doesn't care if it's PS/2 compliant or not.  It must work,
that is the only important thing.  Even more so, given it is flawless

>  Note the translation is done outside the keyboard -- the onboard 8042
> controller is responsible for it.  And it's an obstacle for normal
> operation, most notably you cannot handle hot-plug events as they are
> undistinguishable from a <Shift> release. 

Perhaps you can detect a keyboard being unplugged by periodically
sending it Echo commands (EE), or any other command to which it responds.

-- Jamie
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