Subject: Re: USB mouse goes dark
To: None <current-users@NetBSD.org>
From: Matthieu Herrb <email@example.com>
Date: 04/28/2005 19:37:33
Bill Studenmund wrote:
> Switching away and back fixes things.
> I have a PowerBook running MacOS 10.3.9 that's also hooked into the same
> KVM via USB, and it does the same thing.
Most recent mouses can be programmed from the host. When you use one
with a kvm, there's no way to make sure that each machine connected to
the kvm has set the same internal state in the mouse. So unless you
reinitialise it after a switching the output of the kvm, the mouse gets
out of synch with the OS, and probably won't work.
Switching to a text console and back in X closes and open /dev/wsmouse,
and reinitialises it.
iirc someoone added code to the pms driver in NetBSD to reinitialize the
mouse when protocol errors are detected. I don't know if this catches
all the cases, and if it can be applied to usb mouses as well.