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Windows 7: PS2 Keyboard - works on one PC, not on the other

17 Nov 2017   #1
martinlest

Windows 7 Home Premium SP1 64-bit
 
 
PS2 Keyboard - works on one PC, not on the other

Both PCs run Win7 x64. On one, when I plug in a PS2 keyboard, it works immediately. On the other, it doesn't. I know the PS2 port is OK on that second PC, as a PS2 keyboard works fine in the BIOS (where, I think, PS2 is enabled automatically).

I have seen a suggestion that changing certain registry values should fix this.. but the values are identical in both PCs. There must be some setting that differs between the two PCs that means PS2 works differently in Windows.. anyone know what it might be?

(PS2 showed its worth the other day, when one PC got stuck waking from hibernation - the options, discard or re-use the hibernation data, needed a keyboard input to choose, but all USB had stopped working. Luckily, a spare PS2 keyboard, and of course the fact that my PC had a PS2 port, saved the day!).

Thanks.


My System SpecsSystem Spec
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17 Nov 2017   #2
mrjimphelps

Linux Mint 18.2 xfce 64-bit (VMWare host) / Windows 8.1 Pro 32-bit (VMWare guest)
 
 

Did you power the computer off before connecting the PS/2 keyboard? This is a must.
My System SpecsSystem Spec
17 Nov 2017   #3
martinlest

Windows 7 Home Premium SP1 64-bit
 
 

I rebooted it, yes.
My System SpecsSystem Spec
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17 Nov 2017   #4
mrjimphelps

Linux Mint 18.2 xfce 64-bit (VMWare host) / Windows 8.1 Pro 32-bit (VMWare guest)
 
 

That wasn't what I asked. In order to connect or disconnect a PS/2 keyboard, the computer must be powered down while doing so.
My System SpecsSystem Spec
17 Nov 2017   #5
martinlest

Windows 7 Home Premium SP1 64-bit
 
 

Oh, sorry, you mean totally 'off' - not just in the quasi-off reboot state? On the PC that accepts the PS2 though, I can disconnect and reconnect as often as I like whilst the PC is running; the PS2 keyboard always works. But perhaps that that is because PS2 is already 'enabled'. I'll try connecting the keyboard on the other PC whilst it is off and see if that helps.

Thank you. Will post back ....
My System SpecsSystem Spec
17 Nov 2017   #6
samuria

win 8 32 bit
 
 

If you have always used USB then you may not have drivers installed for it does it show in device manager as unknown device? On the working one check what IRQ etc it used and see if that is being used on the other PC by something else
My System SpecsSystem Spec
17 Nov 2017   #7
martinlest

Windows 7 Home Premium SP1 64-bit
 
 

I thought PS2 had native drivers? Whatever, all looks fine in Device Manager, no exclamation marks. Thanks.
My System SpecsSystem Spec
17 Nov 2017   #8
Megahertz07

Windows 7 HP 64
 
 

Never, ever disconnect or connect a PS2 device with power on. Seen many cases that blew up the hardware.
My System SpecsSystem Spec
17 Nov 2017   #9
mrjimphelps

Linux Mint 18.2 xfce 64-bit (VMWare host) / Windows 8.1 Pro 32-bit (VMWare guest)
 
 

Quote   Quote: Originally Posted by martinlest View Post
Oh, sorry, you mean totally 'off' - not just in the quasi-off reboot state? On the PC that accepts the PS2 though, I can disconnect and reconnect as often as I like whilst the PC is running; the PS2 keyboard always works. But perhaps that that is because PS2 is already 'enabled'. I'll try connecting the keyboard on the other PC whilst it is off and see if that helps.

Thank you. Will post back ....
So far, you have been lucky. I hope you haven't damaged anything by disconnecting and reconnecting the PS/2 keyboard and mouse while the machine is powered up.
My System SpecsSystem Spec
17 Nov 2017   #10
martinlest

Windows 7 Home Premium SP1 64-bit
 
 

OK, thanks for the warning. Since I always use a PS2 keyboard with the 'PS2 OK' PC, I never move the plug. Only done so now when testing. Won't do it again then! I think everything is OK.
My System SpecsSystem Spec
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 PS2 Keyboard - works on one PC, not on the other




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