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Hi all, I'm a linux n00b so please be gentle... Due to limited space, i use a KVM switch to share my monitor between my w*ndows box and my linux ...
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  1. #1
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    KVM switch causing problems


    Hi all,

    I'm a linux n00b so please be gentle...

    Due to limited space, i use a KVM switch to share my monitor between my w*ndows box and my linux box, but it seems to be causing problems with the mouse in linux. If I switch from my linux box to my windows box, then back again, the mouse starts going crazy, jumping to random points on the screen when moved, opening / closing windows itself etc. It doesnt do this in Windows, only in Linux. The mouse then stays like this until i reboot.

    I am using the Mandrake 10.1 distro with KDE, and have set up the mouse as a PS2 wheel mouse. The KVM switch is a Belkin E-series, and my mouse is a Logitech MX700.

    Any suggestions would be much appreciated.

    Ta,

    El Saxo

  2. #2
    Linux Guru sarumont's Avatar
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    This happens with hot-swapping PS/2 in Linux. PS/2 is not a hotswappable plug by nature. I've seen this happen on a laptop before, but unfortunately I haven't researched a resolution.
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  3. #3
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    Thanks for the reply.

    I've done some searching myself and the only solution I can find (including from Belkin themselves, see PDF manual here) is to unplug the mouse from the switch, and plug back in after 2 or 3 secs. While this works, it kind of renders the KVM switch redundant, i might as well swap the mouse cable from one PC to another each time!

    Guess I'll buy a cheap 2nd mouse and just use the switch for video & keyboard...

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  5. #4
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    I have the same problem with a different KVM, things I can do to stop it and work around it are:

    Boot the linux box first, and not use hot-keys (Scroll Lock, Scroll Lock, Arrow)

    The other is to use SSH, and get an SSH client for your windows box that supports X (works really well with Mac).

    I will find my link and post it if you are interested.

  6. #5
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    I had problems like that until I got one of those adapters (PS/2 > USB) for the Linux end.

    Jeremy
    Registered Linux user #346571
    "All The Dude ever wanted was his rug back" - The Dude

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