Trouble after manual roll back to the ACPI Hal

E

epirali

Member
Ok being the adventurous (read stupid) user that I am I tried manually rolling back to the ACPI Hal, and now Parallels VM crashes right before user login screen with attached screen shot. I can boot into Safe Mode, and Fusion can boot with no problems. I have tried switching number of processors, etc, and nothing has helped.

Any thoughts or advice?
 

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epirali said:
Ok being the adventurous (read stupid) user that I am I tried manually rolling back to the ACPI Hal, and now Parallels VM crashes right before user login screen with attached screen shot. I can boot into Safe Mode, and Fusion can boot with no problems. I have tried switching number of processors, etc, and nothing has helped.

Any thoughts or advice?
Click to expand...

Not a problem -)

Just either

a) boot to the safe mode, open the regedit (Start->Run->regedit.exe) and delete the key HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\intelppm

or

b)
1. Attach Windows Installation CD to Virtual Machine.
2. Change boot sequence for Virtual Machine to boot from CD
3. Start Virtual Machine.
4. Once you see a first prompt from Windows, type "R" to enter recovery console.
5. In Recovery Console wait for a prompt to choose your installation, type '1' followed by Return and enter administrator password
6. Run the following command:
Code: 
disable intelppm

You will see service current status SERVICE_DISABLED
7. Exit Recovery Console typing 'exit'.
8. Virtual Machine will be restarted, and Windows will boot properly.
 
Very interesting information. The more I read the more I understand.


Does the registry key deletion or console code revert the vm back to single processor?
 
Tony Rossini said:
Very interesting information. The more I read the more I understand.

Does the registry key deletion or console code revert the vm back to single processor?
Click to expand...

afaik no, but I can't really say with confidence (it's not my work-area), the only thing I know for sure, that there are certain situations when driver intelppm fails and causes BSOD.
 
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BTW the whole experiment was stupid of me, because I didn't pause to think through the fact that I have a 4 processor PowerMac and really SHOULD be running the multi processor HAL! I wasn't even able to boot with BootCamp until I used the very useful tech note, managed to boot and then reverted my the multi processor HAL using "RollBack Driver."
 
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