Re: PS/2 peripherals

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Tim wrote:

I have a feeling the SM mobo would probe the PS/2 ports for a
Keyboard/Mouse and if the KVM wasn't selected on that channel when the
probe happened, the KVM wouldn't respond properly and the mobo would
turn-off the PS/2 ports.  Unfortunately I wasn't able to figure-out
whether this was a linux kernel, kudzu or BIOS probe though...  Anyone
here have any thoughts on that one?

I was under the impression that decent PS/2 KVMs would emulate their
being a mouse and keyboard connected to each device, all the time,
albeit one that was doing nothing, to avoid those sorts of problems (PCs
ignoring PS/2 ports or devices if booted up without anything apparently
connected;

The KVMs are supposed to do that, but apparently it is more complicated than it used to be with auto-detection and maybe even initialization of different device types. Some older ones don't work with mice with scroll wheels and I've always had trouble getting linux and windows to share one properly on KVMs that work with a 3-button mouse.

Windows being unable to cope with you unplugging a PS/2
device, replugging it, then you wanting to carry on using it, etc.).

Normally you can unplug and replug the keyboard/mouse after the boot has completed and windows will still see it. However since the PS/2 connectors aren't spec'd for this there is some chance of blowing up the motherboard when hotplugging.

I've also had some trouble getting windows to recognize a USB keyboard/mouse if it was plugged in for the first time after booting with no keyboard/mouse connected. I always try to boot with one attached or plug it in to get the drivers installed before I expect to need it. After it has been recognized once it will work again, even after a reboot. I don't think linux shares this problem.

--
  Les Mikesell
   lesmikesell@xxxxxxxxx


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