Disabling ACPI in Win 98 SE

[Reureu]

Hi,

Does anybody knows how to disable the ACPI without having to reinstall Windows 98 ?

I am trying to disable everything related to ACPI, especially the automatic shutdown of the computer (i.e. without having to switch the power button off manually).

I am using a new P4 based PC (with an Intel D850MV motherboard), and Windows 98 is running on it.

Thanks.

Reureu.

[boyblue]

You've given us the what, you want to disable ACPI, but you really haven't given us the why.

What is your real objective here?

Is there a problem with your computer that you are trying to fix?

Do you simple not want your computer to go into Sleep Mode?

Does it go into Sleep Mode too soon?

You know you can adjust the length of time; mine is set for 30 minutes. You can also set the computer so it doesn't go into Sleep Mode. Is that all you are trying to accomplish.

I could be mistaken but I think ACPI is used for more than just basic Sleep Mode power management. So, I don't think you can uninstall it without causing other problems.

Give us your real objective, what is at the root of this desire and we can probably help you.

To disable the Sleep Mode/Standby, just go to [Start] [settings] [Control Panel] [Power Management] and set the Power Scheme to 'Always ON'.

You can set some of the other Power Management features there too.

boyblue

[ylen13]

Originally posted by Reureu
Hi,

especially the automatic shutdown of the computer (i.e. without having to switch the power button off manually).

Reureu.

little bit confused about that. What do you men automatically shutdown of the computer? Do you want to turn off computer manually when you to the it safe to shut down your computer instad of it doing it for you?

[Nick Grana]

Give this a look and read carefully:
http://web.ukonline.co.uk/sheppard.p/acpi.html
Make sure you backup the registry first!!
Hope this helps.

[Ridgerunr]

For whatever reason,,if you must,you must. Also disable power management options in bios.

[Reureu]

You are right, I didn't mention why I would like to disable the ACPI.
The computer is integrated into a medical diagnosis tool that has an external power switch and the customers don't like when the computer turns itself off.
They prefer to use the external power switch once the computer displays the "it is now safe to turn off your computer" message, because this power switch also turns off the other peripherals of the overall system.

Thanks to those who tried to help by advising me to turn the ACPI feature off in the BIOS, but it is impossible to turn it off on the Intel D850MV motherboard as this option is not available in the BIOS.
Also note that I have already disabled the APM option in the BIOS.

I am looking forward to reading your solutions.
Regards.
Reureu.

[DrMDJ]

To remove ACPI try the following:

1) Run REGEDIT (Start --> run --> regedit). Go to the key
HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\DETECT
2) With the Detect key highlighted in the left pane, look in the right side pane for a subkey called ACPIOption. If it is there then double click on it and change its value to 2, then click OK. If it is not there then right click in the right side pane and select NEW, then DWORD value. Type in the Give the new key name of ACPIOption (mind the capitalizatin), hit enter. Now double click on the ACPIOption subkey and give it a value of 2, then click OK.
3) Reboot
4) Once windows is up again go in to Add/Remove Hardware in Control Panel. Tell it to detect new hardware. Accept the hardware it found and let it install the drivers. When it asks to reboot do so.

Have your Windows install cd handy. When the system comes back up it will start (re)installing a lot of hardware (drivers) and it will need access to the cabs on the cd. After its finished finding and installing the newly found hardware it will likely want to reboot again. Let it. If it doen't ask then do a reboot yourself.

At this point the ACPI bios based drivers should have been replaced with basic Plug and Play ones. You can check under device manager (System devices) to see.

Now the above method is not the most "tidy" as it will leave behind a number of no-longer used entries in the registry. Using the method of deleteing the Enum registry key first that was described in the article Nick Grana referenced will not leave behind these "old" entries. But the downside is that you may also have to reinstall drivers for various other devices you have (have added) sound cards, net cards, etc, etc). Your choice as to what ya want to do. It actually may be less painfull to just not worry about the left-behind entries.