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Re: KVM FYI



On Sun, 20 Jun 2004, Sean Estabrooks wrote:

> 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 varying 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 usually
> not a big problem in situations where KVM's are employed.

I do not know where you work, but wheel mice are the norm everywhere I work.
It worked before so as far as I am concerned some change in this latest
kernel broke it. I have had this kvm for 3 years without a problem. It worked
with RHL 7.3/8.0/9, FC1, FC2 until now. I just looked in bugzilla and saw the
same suggestion. The problem is that for me not having my wheel work is
just as bad as not having the mouse work. I am used to having it so if it
does not work, I will waste time scrolling the wheel.

I realize some of the software in the kvm's are crap but they are not going
to go away. At the very least Red Hat should put some of them on the HCL and
say these are supported. At least then I would have an idea what to buy. 
The way things are now it is a crap shoot and even if you get one that works
perfectly today, tomorrow some change to the kernel might break it.

If the one I have had never worked I would have sent it back. For obvious
reasons that is not an option now.

One other thing I have noticed, with the old kernel switching between the 
different machines with the kvm was instantaneous. With the new kernel
there is about a 1 second delay. Something changed and it is not for the
better.


Regards,

Tom




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