Making Sure the Correct HAL is Installed

[M4LMiniMe]

how do i fix it
in device manager under computer i get standard pc which is not right how do i make the change to ACPI uniprocessor PC

 

[kylef]

If this is a new install, then here are the steps to specify a HAL during setup.

 

[mikecel79]

You can't move from a Standard PC HAL or any of the ACPI HALs once Windows is installed. You have to reinstall it for that.

 

[kylef]

Originally posted by: mikecel79
You can't move from a Standard PC HAL or any of the ACPI HALs once Windows is installed. You have to reinstall it for that.

Technically, you just have to re-run setup and have it "repair" your installation (which means, copy over the old HAL with the new one you've specified by hitting F5).

But the safest way to do it is to do a fresh install following the instructions I listed above.

 

[mastertech01]

Im not sure if you can change from standard to ACPI if your board is not ACPI enabled. Perhaps this can occur if you have the MPS revision set in bios to REV 1.1 instead of REV 1.4.

I have changed from uniprocessor ACPI to multiprocessor ACPI by simply treating it like a driver change... highlight computer description and right click and select properties, click update driver, and select the description of choice, and then apply and then reboot. At this point when your computer reboots you need to make the changes in BIOS to reflect your necessary change... So if you were going to change from uniprocessor to multi processor then you would enable hyperthreading in bios... changing from MPS 1.1 to MPS 1.4, etc...

Otherwise you will have to reinstall windows after resetting everything appropriately in BIOS. At least it worked this way for me in the past with Win2K and XP Pro prior to SP2

 

[kylef]

His setup is a P2 400Mhz Gateway (most likely running a 440BX chipset), so it should most likely support ACPI if the BIOS was ever updated.

There is actually another thread on this (which is how I know what system he has), and I mentioned in that thread that Setup usually picks the HAL according to what it thinks your BIOS is capable of.

Some older ones claim to support ACPI but in fact do not, and Setup chooses Standard PC anyway.

But like I said, most older 440BX boards will work with the ACPI HAL no problem. Just flash your BIOS and you should be fine.

 

[Rhagz]

Its not too hard to go from ACPI to standard PC just by changing it in the device manager and changing your BIOS setting, but going from standard to ACPI is nearly impossible without a repair or full reinstallation of the OS.

 

[mikecel79]

Originally posted by: Rhagz
Its not too hard to go from ACPI to standard PC just by changing it in the device manager and changing your BIOS setting, but going from standard to ACPI is nearly impossible without a repair or full reinstallation of the OS.

This doesn't work either. It has to do with the way an ACPI BIOS enumerates hardware for the OS. It doesn't matter if you start with Standard or ACPI, switching between them will cause Windows to not boot.