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Downgrading from HyperThreading (to uniprocessor) in XP Pro

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Anonymous
September 17, 2004 6:49:29 PM

Archived from groups: microsoft.public.windowsxp.hardware (More info?)

Hi,
I've found myself in a situation where I need to disable HyperThreading in
Windows XP Pro in order to get a device working. Instead of re-installing XP
after disabling HT in the BIOS what else do I need to do?

As far as I can make out, I need to copy in the uniprocessor HAL and kernel
components (ntoskrnl.exe ==> ntoskrnl.exe and halacpi.dll ==> hal.dll).

Anything else?

Cheers
Anonymous
September 17, 2004 9:39:10 PM

Archived from groups: microsoft.public.windowsxp.hardware (More info?)

"Lee Rhodes" <daddy_rhodes@hotmail.com> wrote in message
news:urwgE1LnEHA.608@TK2MSFTNGP09.phx.gbl...
> Hi,
> I've found myself in a situation where I need to disable HyperThreading in
> Windows XP Pro in order to get a device working. Instead of re-installing
XP
> after disabling HT in the BIOS what else do I need to do?
>
> As far as I can make out, I need to copy in the uniprocessor HAL and
kernel
> components (ntoskrnl.exe ==> ntoskrnl.exe and halacpi.dll ==> hal.dll).
>
> Anything else?
>
> Cheers
>
>

Actually, you may not need to do anything other
than disable it in the BIOS. XP should work fine
with a multiprocessor HAL even when HT has
been disabled.

Try it, and then try your problem situation as well.
Anonymous
September 18, 2004 2:55:28 AM

Archived from groups: microsoft.public.windowsxp.hardware (More info?)

For me, disabling HT in the BIOS and then booting into XP works just
fine. It actually reconfigures XP as a uniprocessor machine and all
works just the same :) 

----
Nathan McNulty


V Green wrote:
> "Lee Rhodes" <daddy_rhodes@hotmail.com> wrote in message
> news:urwgE1LnEHA.608@TK2MSFTNGP09.phx.gbl...
>
>>Hi,
>>I've found myself in a situation where I need to disable HyperThreading in
>>Windows XP Pro in order to get a device working. Instead of re-installing
>
> XP
>
>>after disabling HT in the BIOS what else do I need to do?
>>
>>As far as I can make out, I need to copy in the uniprocessor HAL and
>
> kernel
>
>>components (ntoskrnl.exe ==> ntoskrnl.exe and halacpi.dll ==> hal.dll).
>>
>>Anything else?
>>
>>Cheers
>>
>>
>
>
> Actually, you may not need to do anything other
> than disable it in the BIOS. XP should work fine
> with a multiprocessor HAL even when HT has
> been disabled.
>
> Try it, and then try your problem situation as well.
>
>
!