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Date:      Mon, 21 Aug 2000 10:28:25 +0200
From:      Graham Wheeler <gram@cequrux.com>
To:        Randy Primeaux <randy@Cloudfactory.ORG>
Cc:        freebsd-stable@FreeBSD.ORG
Subject:   Re: ps2 mouse errors (solution)
Message-ID:  <39A0E829.B183E24C@cequrux.com>
References:  <200008182038.NAA10998@relay.ultimanet.com>

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Randy Primeaux wrote:
> 
> In my opinion, I do not see this as a flaw in psm, as the flag is
> documented in the man page, and FreeBSD psm is not the only software
> with this issue.  Other mouse software, on other OS platforms, also
> lose ps/2 sync through a keyboard-video-mouse switch.

[Sigh] I'll say it again. There are TWO separate problems here, both of
which will manifest as lost sync and the `out-of-sync' error message.
One of them is due to the use of KVM boxes. The other isn't - it occurs,
for example, on my Compaq laptop using the built-in touchpad, and has
affected other people as well. I maintain that the latter is due to a
bug or oversight in the psm driver, as tweaking the code in this driver
has allowed me to circumvent the problem. However, my tweaks deal with
the symptoms; I have not identified the underlying cause other than that
it seems to be related to spurious data (rather than lost data).

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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