Re: Analysis of KVM Switch Problems
From: James Knott (bit_bucket_at_rogers.com)
Date: 06/27/04
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Date: Sun, 27 Jun 2004 13:11:24 GMT
Mark S Bilk wrote:
> And if, e.g., the mouse driver has changed significantly between
> the 2.4 and 2.6 kernels, and the newer one doesn't perform as
> well with a bad KVM switch, one might examine the driver code and
> see if it has been revamped and some mechanism for recovering
> from spurious signals has been eliminated, and could be put
> back in. It's fairly easy to locate the pertinent code in the
> kernel sources, and presumably one could contact the relevant
> programmer, or post a message to the kernel mailing list, if
> one has carefully characterized the problem, and proved that
> it only happens with the new kernel version and not the old.
> But they may tell you to either get a good KVM switch, or do
> the reprogramming yourself. 8^)
>
I have an electronic switch (Protec Bytelan). Using the switch messes up
Linux, but not OS/2 or Windows. While the problem happens in both Red Hat
7.3 and SuSE 9.1, in Red Hat, I can recover by switching to a text console
and back. This does not work in SuSE 9.1. This means that what's an
annoyance in RH becomes a show stopper in SuSE 9.1. It sounds to me, as
though the problem is in Linux and particularly in SuSE 9.1. Also, when
using RH, I found disabling Z axis cleared the problem. I haven't tried
that in SuSE. Perhaps we should be looking at the differences, when Z axis
is enabled?
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