[Solved] x86 Minimal Installation CD doesn't boot in Hyper-V

solamour · Last edited by solamour on Fri Feb 23, 2024 12:49 am; edited 1 time in total

When I boot the x86 version of Minimal Installation CD (2024-01-29) in Gen1 Hyper-V (Windows 11 host), the booting process stops almost immediately.

https://ibb.co/t3nkC7c

If I try the same with Gen2 Hyper-V, I see the penguin logo, but then it stops.

https://ibb.co/McBTmXg

amd64 works in both Gen1 and Gen2. Considering that x86 does boot correctly in VirtualBox, I'd say it's a Hyper-V problem, but I'm not sure how to proceed from here. I'd appreciate any suggestions.
__
sol

sMueggli · Guru Joined: 03 Sep 2022 Posts: 374

Hyper-V Generation 2 is using EFI booting (and you would need to disable Secure Boot in the security settings of the vm) and that is unlikely to work with 32-bit images (but probably not impossible).

Did you verify the checksum of the downloaded ISO?

solamour · Posted: Sat Feb 10, 2024 6:16 am Post subject:

Turned off "Secure Boot" and "Trusted Platform Module". Verified the checksum. Still doesn't boot in Hyper-V Gen1/Gen2, but it does work perfectly in VirtualBox (both 32-bit and 64-bit guest). Perhaps Hyper-V doesn't support 32-bit OS.
__
sol

sMueggli · Guru Joined: 03 Sep 2022 Posts: 374

I installed Hyper-V on a Windows 11 Pro.

Booting a Gen1 vm gives me the same result. But booting a Gen2 without "Secure Boot" (under the Security settings) boots fine.

solamour · Posted: Sun Feb 11, 2024 5:36 pm Post subject:

Gentoo x86 in Hyper-V (Win11) Gen2 without "Secure Boot" still doesn't boot in my case. I'm starting to suspect that maybe Hyper-V doesn't play well with an AMD CPU.
__
sol

sMueggli · Guru Joined: 03 Sep 2022 Posts: 374

I did another test. I enabled the flag under the processor > compatiblity settings. And the generation 2 vm failed. Disabling the flag and the vm boots again. I have an Intel CPU.

solamour · Posted: Tue Feb 13, 2024 3:58 am Post subject:

Just to see what happens, I tried "Processor compatibility" on and off in a freshly installed Windows 11. Same kernel panic. But then again, it was another AMD setup, so at least that part is consistent. I don't have an Intel setup, so the experiment ends there. Curious to know how it works for others, either AMD or Intel.

Also, I'm not able to boot other x86 distros (e.g. Arch, Debian, Ubuntu) with Hyper-V Gen1/Gen2, even though they all work fine with VirtualBox.
__
sol

solamour · Posted: Fri Feb 23, 2024 12:48 am Post subject:

I borrowed an Intel laptop and verified that x86 Gentoo Minimal Installation CD does boot in Gen2 with Secure Boot off. Arch x86 works as well. I'm going to chalk it off as an incompatibility in AMD/Hyper-V combination. Thanks everyone for sharing your thoughts and suggestions.
__
sol