pfSense

I too have Hyper-V and have reoccurring boot hang issues.

Today, had a hang and went to boot, which froze. Turned-off/on the vm and chose option 3 to halt auto-boot and escape to the loader prompt. Waited 15 seconds, and then typed Quit to exit the loader prompt. It then booted immediately.
In the past I've done various command at the loader prompt and typed boot. If done too fast, still hangs.

I suspect the delay in booting is what actually fixes the issue. Possibly there is a delay with the hyper-v host making a hardware resources available or delay in the VM recognizing it.

To test this theory and try a fix, I added a 30 second delay to auto-boot. This is done by editing /boot/loader.conf.local (create it if it does not exist) to include the following line:
autoboot_delay="30"

Make sense what u say.

I will try your steps, on which OS version are you running HyperV?

Thanks.

I have tested and works, I add just 20 seconds but is a value that we can adjust, but looks like we found the patch until we get a solution.

Hope this help pfsense team to troubleshoot the issue, another user on reddit report the error on vmware

Thanks buddy!!!

Thanks for the update, but for people that use CE we need to figure the way to make work, we cannot wait for upstream, at least we can work now.
Regards.