View Full Version : USB keyboards

21-12-2007, 10:28 AM
Something that has been on my mind lately is USB keyboards.

Given that a number of motherboards these days do not have PS/2 ports and one has no option but to use a USB keyboard, how on earth does one use it prior to loading the operating system? By that, I mean press the Del key to enter the BIOS or press F8 to get into Safe Mode, etc. On all my PCs the only way to enter these modes is to use a PS/2 keyboard. The USB keyboard is not accessible until Windows or Linux has loaded.

Do these PS/2-less motherboards recognise the USB keyboard upon POSTing so that one is able to use the keyboard before fully booting up?

Speedy Gonzales
21-12-2007, 10:32 AM
Hmm I use USB kb's here. And have never had any probs, with using one normally, or when I format these. They work fine.

It may depend on what the mobo is?

On whether USB works or not.

21-12-2007, 10:36 AM
Mine is an older keyboard it is PS/2 but it has a USB Adapter plugged into the PC/2 so I use it as USB. It works fine in BIOS.

I use an ASUS Board but did have a Gigabyte board in for a while it worked fine with both.

21-12-2007, 10:44 AM
had a similar issue on my old board. all i had to do to get it to work was enable it in the bios. it may work. most that don't have ps/2 ports should have usb enabled on post anyway. otherwise its rather pointless really.

21-12-2007, 12:28 PM
My USB keyboard works fine to get into the BIOS and such before Windows, BUT I can't use it to wake up my PC from power off where as I can with a PS/2 keyboard.

21-12-2007, 02:17 PM
Given that a number of motherboards these days do not have PS/2 ports

What boards don't have any? I've seen them without PS2 mouse but not none at all.

21-12-2007, 02:31 PM
What boards don't have any? I've seen them without PS2 mouse but not none at all.

My new asus one doesn't have a mouse one, but still has a keyboard one.

23-12-2007, 02:13 AM
The basic Keyboard should work fine. We use a USB keyboard on various machines with or without O.S. No Probs.Sometimes you will have to go to setup and enable related features.

Hope this help.


Graham L
23-12-2007, 02:31 PM
Any motherboard which does not have PS/2 connectors will have a BIOS which can use a USB keyboard without any manual intervention.

The manufacturers would certainly realize this could be a problem before any were shipped. ;)

Some BIOSs needed to have a BIOS configuration setting made with a PS/2 keyboard to allow use of USB "Human Interface Devices". This is what the "Legacy Device" settings do. But if you haven't got a choice, the BIOS code will be written to make the USB devices work immediately.

23-12-2007, 02:47 PM
I use a USB keyboard on a boardwith PS/2 and USB. Works fine, never had to change any settings (although I went to BIOS setup and enabled USB keyboard support just in case)

I think for boards without PS/2 ports that setting is on Auto, so if you have a USB keyboard it will work (provided it gets detected properly I guess)