Re: Input issues - key down with no key up

From: Vojtech Pavlik <vojtech@suse.cz>
To: Jamie Lokier <jamie@shareable.org>
Cc: "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>,
	Vojtech Pavlik <vojtech@suse.cz>,
	Andries Brouwer <aebr@win.tue.nl>,
	Neil Brown <neilb@cse.unsw.edu.au>,
	linux-kernel@vger.kernel.org
Subject: Re: Input issues - key down with no key up
Date: Sun, 17 Aug 2003 23:54:36 +0200	[thread overview]
Message-ID: <20030817215436.GA24933@ucw.cz> (raw)
In-Reply-To: <20030816140901.GC23646@mail.jlokier.co.uk>

On Sat, Aug 16, 2003 at 03:09:01PM +0100, Jamie Lokier wrote:
> Maciej W. Rozycki wrote:
> > On Fri, 15 Aug 2003, Vojtech Pavlik wrote:
> > > > The PS/2 keyboard protocol is utterly absurd.
> > > Yep. It's a dozen or more years of hack upon a hack.
> >  Well, mode #3 with no translation in the i8042 looks quite sanely. 
> 
> What are the known problems with mode #3, then?

It's broken on many keyboards (on some only slightly, like some keys not
working properly). Other (special, either unix workstation or point of
sale) keyboards need it to work properly.

> That is, why doesn't everyone use it and why haven't they always used it?

Because old AT keyboards didn't support it. Because the XT keyboard
didn't support it. Because history sticks.

> For that matter, what does Windows use?

Translated Set 2. Actually an emulated XT keyboard.

-- 
Vojtech Pavlik
SuSE Labs, SuSE CR