Setting CPU type to anything but Default KVM64 results in boot loop

[Shadow Sysop]

I'm very new to Proxmox and Hypervisors in general. VMs install and run with no issues when the CPU type is set to Default KVM64, but setting to Host (or if I specify the processor type as Westmere, which it is, it errors the same way) will result in an error when installing OS after the reboot, never successfully booting after the installation. I wanted to try VMs with CPU set to host to optimize performance but seem to be unable.

 

[dcsapak]

which os did you try to install? can you try with a different one? are there any erros in the syslog/journal?