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Date:      Wed, 17 Jul 2002 23:03:32 -0700
From:      "Philip J. Koenig" <pjklist@ekahuna.com>
To:        Questions@FreeBSD.ORG
Cc:        "Michael Wells" <mwvw@adelphia.net>
Subject:   Re: When is FreeBSD going to work properly with KVM switches?
Message-ID:  <20020718060333533.AAA1067@empty1.ekahuna.com@pc02.ekahuna.com>
In-Reply-To: <03c401c22dea$ee258a30$0a01a8c0@mswolf>

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On 17 Jul 2002, at 16:37, Michael Wells boldly uttered: 

> > > > I also have the problem that the KVM must be set to the machine being
> booted
> > > > in order for the mouse and keyboard to work properly. This is a know
> problem
> > > > and there was discussion on it. The problem seems to have appeared
> with 4.2.
> > > > I saw a fix in the freebsd-stable archives:
> > > >
> > > >    FROM: John Baldwin,
> > > >    DATE: 11/20/2000 16:43:35
> > > >
> > > > Basically the proposed solution was to remove the `flags 0x1' from the
> > > > atkbd0 device line in the i386/conf/file
> > > >
> > > > This fixed the problem I was having with the Omni Cube 4-Port. I have
> > > > not checked if this problem still occurs with 4.6.
> > > >
> > >
> > > Actually, if one searches through the archives you'll find the mouse/kvm
> > > issue dates back to the 3.x days. Apparently it isn't a high priority so
> > > I wouldn't hold my breath for an always working fix.
> >
> >
> > I really really really wouldn't be so quick to assume the problem is
> > FreeBSD.  In my experience, Belkin's are not very good KVMs, I won't
> > use them any more, personally.  I've had problems with them not
> > correctly initializing keyboard or mouse ports with Windows as well.
> > Never had a problem with FreeBSD and KVM switches, personally.
> >
> > If you want a good KVM, stick with either Avocent (my personal
> > preference - used to be Cybex and Apex), Raritan, Rose, or one of the
> > companies that OEMs the Avocent switches. (ie Compaq, HP, Dell) The
> > cheapo KVMs are cheap for a reason.
> >
> > (Then you've got "RichardH" saying Belkin's are overpriced, LOL..
> > well I never tried D-link KVMs, maybe they're OK for a cheapo
> > model :-)
> >
> >
> I have a Belkin 4 port OmniView that works just fine with FreeBSD and
> w2k.  I had to add a flag to my kernel to keep things study when
> switching back and forth, but other than that it's been just fine.
 

If I'm interpreting the "fix" right, what it does is force the OS to 
think there's a keyboard present even if there may not be. (the flag, 
which is not on by default, makes FreeBSD check for a keyboard)

There are 2 primary functions of a KVM from the standpoint of a 
computer's keyboard interface: looking like a keyboard when the PC 
boots and checks the keyboard interface, and maintaining state on the 
keyboard signals so they are restored when that particular PC is un-
selected and re-selected.

In summary, the whole point of a KVM is to make the connected 
computer see what looks like a regular, connected keyboard.  If you 
have to do anything to the OS to get it to act as it normally does 
without a KVM, the KVM isn't doing its job right.  


--
Philip J. Koenig                                       pjklist@ekahuna.com
Electric Kahuna Systems -- Computers & Communications for the New Millenium


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