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Old 11-12-2005, 08:07 PM   #1
Registered: Nov 2003
Location: Sioux Center, IA
Distribution: RH9, Fedora Core I,II,III
Posts: 37

Rep: Reputation: 15
Mouse looses sync during KVM Switch

I know this question has been asked before. I have spent hours searching google and found no solution that works. Why is this? The problem I have is this: When switching from back to my Fedora Core IV box, the mouse suddenly starts to act all jumpy, doing random clicks and being generally useless, until I restart the computer. The exact error messages showing up in /var/log/messages is:

psmouse.c: Wheel Mouse at isa0060/serio1/input0 lost synchronization, throwing 1 bytes away.

I have tried unplugging and replugging the mouse in the machine, no good.
I have tried restarting X, no good.
I have tired restarting GPM, no good.
I have tried adding "Protocol" "IMPS/2"" to the xorg.conf file, no good.

This is a production server which I cannot restart just to get the mouse going all the time.

I need the KVM. Removing it is not a viable option.

Research on google shows this problem is more than just a Fedora issue and is very common. Why has no one in the programming world found a fix yet?

(For what its worth, I have a Belkin OmniView Pro 4 port KVM, F1D104. I am using a Compaq 2 button, 1 wheel (M/N M-s48a) PS/2 Mouse. I have no problem when switching to MSWindows, ever).

If their is a workable solution, could someone please help me find it. I would very much appreciate it.


Old 11-13-2005, 12:22 AM   #2
LQ Guru
Registered: Jan 2002
Posts: 6,042

Rep: Reputation: Disabled
There is a fix. Many distributions that use kernel version 2.6.x has a problem with PS/2 mouse. Usually they have PS/2 mouse as built-in. To get around the problem, re-compile the kernel with PS/2 mouse as a module not as builtin. You are not done yet, you will have to load the module manually because putting in /etc/modules.conf or /etc/modprobe.conf will not work. Depending on the distribution you can place a line /etc/rc.local that states /sbin/modprobe psmouse. The mouse should not be jumping around. However, not all KVM switches and mouse are created equal, so you will have to test several of them until a combination that works the best.

BTW, Why is the server running GUI? It should NOT be running GUI.


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