Problem setting USEPLATFORMCLOCK on Vista

Question

Hi,

A number of 3rd party sites claim that the Vista/Win7 equivalent of the XP /USEPMTIMER BOOT.INI switch is

    bcdedit /set useplatformclock true

But when I try this on a Vista-based system (its a server SKU, but same OS as Vista SP2, NT 6.0.6002), I get this error:

C:\Windows\system32>bcdedit /set useplatformclock true

The element data type specified is not recognized, or does not apply to the

specified entry.

Run "bcdedit /?" for command line assistance.

(I have also tried various syntax variations, with same or worse errors).

So what is the Vista (32 bit i386) way to work around systems where the CPU TSC disagrees with the PM/Platform timer (ACPI/PIT)?

Is it just some different spelling, or do I need to set it in a different place on Vista?

Note that this is a known issue with the TSC and the system vendor recommends the above setting to be used on all XP/Vista/Win7 installations on that system.

Answer 1

Thanks, I have posted an equivalent question there, however chances are that the actual answer, if found, may come from either community, since it is just a different SKU of the same Windows version.  Once someone comes up with a good answer in either forum, I will pass it on to the other forum.

So for other participants: Please answer anyway if you know how to do this on Vista (I know it works on Win7 and XP).

Answer 2

Hi,

The issue you posted would be better suited in the TechNet community. Please visit the link below to find a community that will offer the support you request.

http://social.technet.microsoft.com/Forums/en-US/category/windowsserver

 Hope this information is helpful.