Making Mouse Wheels Work w/ a KVM?

Posted by Cliff on Monday June 23, 2003 @08:30AM from the pesky-hardware-filtering-of-input-signals dept.

Elvii asks: "My mouse wheel doesn't want to work through my KVM. It doesn't work in X11 under Linux (Debian 3.0, kernel 2.4.20), but it works in Windows on same machine, through same KVM, so that tells me it's a protocol or driver issue , which is beyond me. I have no other OS's to test on, although I read online that FreeBSD can handle the mouse wheel in this type of setup. When I set the mouse type to IMPS/2, it just twitches in corner and randomly clicks. Anyone know if it's a kernel issue or an X11 issue? I've googled and found nothing of real use there - just that some KVMs work and some don't. Plain PS/2 works but I want my wheel too." The kicker is that when the mouse is plugged directly to the machine, the mouse wheel works just fine! Has anyone else experienced the problem? What did you do to fix it?

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Fix: by mikh · 2003-06-23 15:12 · Score: 3, Interesting

Logitech mouse? Most KVM's support only MS Mouse wheel mode, and not Logitech one. You need to switch your mouse it to Microsoft Wheel mode.

Download imwheel rpm... It includes little utility called setimps2. Put call to setimps2 to your /etc/rc.d/rc.sysinit, at the very top (before it starts gpm)

In X86Config under mouse put

Protocol "IMPS/2"
Device "/dev/mouse"
ZAxisMapping 4 5

That fixed it for me, until I switched to Logitech laser mouse, which defaults to MS mouse protocol instead of Logitech one, which works fine without this fix.