> Thank you for your feedback. > > Unfortunately the manufacturer of our application software will only > support > it on RHEL/CentOS 7.0. I have asked and that is all they say. > When the CentOS 7.0 boots it does not recognise the CPU ID, flags it as a > soft error then continues. > The Haswell and the Ice Lake both have 28 cores but different frequencies. > A couple of clues. At the boot prompt the server cooling fans are running > slowly. When it hangs, after a short delay, the fans run faster and this > is > repeated. > Also, when it hangs the keyboard is unresponsive and the server status > LED's > state that all is okay. > If Intel adhere to the x86_64 standard for their processors then surely > the > only difference would be the addition functionality. > I am trying to find a resolution as this particular application is perfect > for our requirements. > Mark But, if you only install the newer kernel, does your application work on it? If so, why not just run it that way? Apart from that, you could install a current distribution on the host and then let the application server run in a KVM instance. That way you can fine tune what kind of CPU/features are provided to the VM. Regards, Simon