After enabling HYPER-V role / Processor Execute Disable BIT server HANG during booting...

Tpm1973 used Ask the Experts™

i have installed windows 2008r2 english (german regional settings) on IBM x-series 3650 server.
after this i have enabled the hyper-v role.
the server restarts without any problems...

then i tried to install a VM, but then i saw that i have forgotton to enable the PROCESSOR EXECUTE BIT to ENABLE

so i shutdown the server; changed the BIOS settings to PROCESSOR EXECUTE BIT to ENABLE
restart the server: --> the server is booting, after some secconds i see only a black screen and the server is HANGING...

if i change back the BIOS settings to: PROCECSSOR EXECUTE BIT to DISABLED
then the server starts fine... but i can't start a VM as i get the info: "...hyper-v service is not running..."

i also tried to install w2k8r2 SP1

so what can i do ???


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did you enable hyper-thread on your bios? try disable it.
kevinhsiehNetwork Engineer
I would install Windows 2008 R2 SP1, and then apply the post SP1 hotfixes.

Hotfixes for Hyper-V 2008 R2
there was a problem with the CPU's

i removed the 2 CPUs and inserted 2 NEW from another server (same model)
and after this everyhting works fine...


i did several tests and solved the issue by my own....

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