Having problems with your Dell OptiPlex GX280 PC Desktop ?
USB Keyboard and mouse wont work with PS2 KVM with adapter
\015 I am connecting to my PCs via KVM. My mouse and keyboard are usb. The KVM has PS2 ports. I am using USB to PS2 adapter(green) to connect to the KVM and then PS2 to USB adapters to connect the other end of the PS2 cables from the KVM to the Dell GX280 tower. I need to have the KVM working. Any assistance would be greatly appreciated. The USB keyboard and mouse does work fine when hooked up directly to the Dell.\015
I had the same problem. My mouse was jumping like crazy around the screen. The problem occurs when you have a KVM with PS2 keyboard/mouse connectors and DELL with USB connectors and you have to use a PS2-to-USB adapter to link KVM with DELL. The solution: if your DELL has PS2 connectors just use PS2-to-PS2 cable to link KVM with DELL. If your DELL does not have PS2 connectors (e.g. DELL OPTIPLEX SFF machines do not have PS2 connectors) but only USB connectors, you have to buy the original DELL's Serial-PS2 port adapter for OptiPlex 330/ 780 DT/ 780 MT/ 780 SFF/ 780 USFF Desktops (with two separate PS2 connectors and one serial DB9 connector) and attach this adapter to the 24-pin socket on the motherboard. Then you have to link your KVM with the adapter's PS2 connectors. This solution ended my problems. A mouse itself is not the problem. It can be with a PS2 or USB connector, it can be a ball or optical one. It doesn't matter.
Don't use USB-PS2 adapters if the keyboard/mouse doesn't support such adapters. They aren't universal, they work only with some "smart" (or chinese) keyboards that can detect the connection type and switch between USB and PS/2.
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