Re: Windows 11 24H2

[lacsaP Patatetom]

Le mar. 29 oct. 2024 à 16:09, lacsaP Patatetom <patatetom@gmail.com> a écrit :

Le mar. 29 oct. 2024 à 15:52, lacsaP Patatetom <patatetom@gmail.com> a écrit :

hi,

in order to have “portable” VMs, I used to install them with Qemu's `-cpu qemu64` option, but it turns out that the Windows 11 24H2 installation CD no longer boots with this option : do you know which CPU flag to use to maintain the desired "portability"* ?

note that Windows 11 24H2 boots without any problem if I pass it the `-cpu host` option, and Windows 23H2 boots without any problem with the `-cpu qemu64` option.

(* boot the VM on both Intel and AMD without it having to reconfigure itself)

regards, lacsaP.

using older and older emulated Intel processors, Windows 24H2 installation CD boots with the `-cpu Nehalem` option.

`-cpu Nehalem` (2008) -> OK
`-cpu Penryn` (2007) -> KO
`-cpu Conroe` (2006) -> KO
`-cpu qemu64` -> KO

dates are those given in Qemu documentation (https://qemu.readthedocs.io/en/v9.1.0/system/i386/cpu.html#preferred-cpu-models-for-intel-x86-hosts).

a little Googling returned the answer : " Microsoft blocks some PCs from Windows 11 24H2 - CPU must support SSE4.2 or the OS will not boot ".

https://www.tomshardware.com/software/windows/microsoft-updates-windows-11-24h2-requirements-cpu-must-support-sse42-or-the-os-will-not-boot

https://jensd.be/2547/windows/upgrade-to-or-install-windows-11-24h2-on-unsupported-hardware

so `-cpu qemu64,+sse4.2` does the job !