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Date:      Thu, 17 Aug 2000 18:00:38 +0200
From:      Graham Wheeler <gram@cequrux.com>
To:        "Sean O'Connell" <sean@stat.Duke.EDU>
Cc:        freebsd-stable@FreeBSD.ORG
Subject:   Re: ps2 mouse errors
Message-ID:  <399C0C26.EEA0EE8F@cequrux.com>
References:  <20000817001624.A22518@jupiter.limit.org> <14748.115.748006.95674@onceler.kciLink.com> <20000817114143.H71098@stat.Duke.EDU>

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Sean O'Connell wrote:
> 
> I think there are some subtle timing issues in syscons code or in moused
> that are really ugly and have been around since just after 4.0-RELEASE

It isn't a problem with moused, it is a problem with the psm driver, or
possibly (but less likely) the kbd driver. People experience it in
syscons consoles with moused, as well as under X without moused.

It will be great when its finally solved, but it's a real nasty one to
solve. Personally I suspect it is due to nested or lost interrupts;
unfortunately the PS/2 mouse doesn't have a proper framing protocol
which makes synchronisation difficult if any data is ever lost.

gram
-- 
Dr Graham Wheeler                        E-mail: gram@cequrux.com
Director, Research and Development       WWW:    http://www.cequrux.com
CEQURUX Technologies                     Phone:  +27(21)423-6065
Firewalls/VPN Specialists                Fax:    +27(21)424-3656


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