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Re: KVM FYI



On Sun, 20 Jun 2004 15:04:01 -0400 (EDT)
Tom Diehl <tdiehl rogueind com> wrote:

> On Mon, 21 Jun 2004, Colin Charles wrote:
> 
> > On Tue, 2004-06-15 at 10:16, Dwaine Castle wrote:
> > 
> > > I've never received a reply from the vendor about FC2 support, but at least
> > > one user speaks highly of this product.
> > 
> > KVM's are usually software agnostic - they should "just work"
> 
> It would be nice if that were true. Upgrading to the latest kernel
> for fc2 broke my mouse. Switching back to the old one fixes it again.
> It is broken in both X and the text console. Moving the mouse slightly
> causes it to jump all over the screen. I would put it in bugzilla except
> I know they will just close it and say kvm's are unsupported. Personally
> I think that stinks but who am I. They want to appeal to enterprise customers
> but will not support a piece of hardware that is used by 99% of enterprise 
> customers. Yes I know this is Fedora core but the attitude is the same for
> RHEL.
> 
> Just my $.02
> 
Tom,

This is more of a kernel issue.  The problem is that the KVM implements
an internel virtual mouse that is connected to all but the focused computer.
These internel mice are implemented with varrying degrees of success
and feature support by KVM manufacturers.   With many KVM's these
virtual mice confuse the kernel input subsystem and thus when you 
switch back, mouse functionality is disrupted.   

You can use:

psmouse.proto=bare

on the kernel boot line and that will usually work to make the kernel ignore
poorly implemented virtual mice in a KVM switches.   The price
you pay is scroll wheels and extra buttons won't work.   This is usally
not a big problem in situations where KVM's are employed.

Cheers,
Sean




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