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Keyboard Sleep/Power

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Hondy

Technical User
Mar 3, 2003
864
GB
We have a load of new keyboards with power management buttons on. They have only been in one day and the power has been turned off accidentally on an important PC already.

Is there any software (e.g. registry) way of disabling this "functionality"? (like it's so much more difficult to power off using the windows menu...)

I can't find a BIOS setting on the PC's for ACPI, and I don't want to replace the keyboards, help please!
 
Usually there is some third Party aplication that has been installed by the VENDOR that does this.


Regards

Jonno BrainDump Specialist
MCSE(NT) MCSA(2k) CCNA
 
No, there is no 3rd Party software installed, they are quite cheap keyboards. It's to do with Windows implementation of ACPI I think.

There must be a registry setting to disable it?
 
I found this in 3 seperate places

"There is no direct way of disabling the buttons"

Apart from the Bios

Regards

Jonno BrainDump Specialist
MCSE(NT) MCSA(2k) CCNA
 
I created the binary value "Scancode Map" in HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Keyboard Layout" and filled it with 00 00 00 00 00 00 00 00 02 00 00 00 00 00 5E ED 00 00 as recommended by wolluf. It didn't work. I read and turned right ctrl to nothing filling the value's data with 00 00 00 00 00 00 00 00 02 00 00 00 00 00 1D E0 00 00 00 00. It worked. Then I tried to turn right ctrl into power down key and nothing happened. I tested then with a virtual machine (key substitution done in host machine) and the virtual machine "understood" the power off command issued by pressing the substituted right ctrl key. So this substitution occurs later than power down key processing.
 
In the Control Panel - Under power Options ( which is under Performance and Maintenance if you have the category view instead of classic ) select the Advanced Tab there is a 'Power Buttons' section. Set both of them to 'Do Nothing' and they'll never bother you again.

Hope this helps.
 
In hardware you used to tie the "Reset" to the keyboard controller chip, as it offered a NMI (Non-Maskable Interrupt) to the processor for "Power Good."

If your keyboard mechanicly ties the key to the NMI on the controller chip, there is nothing you can do in software to stop this.

Take a pair of vice grips, or a screwdriver, and remove the key from the keyboard.
 
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