CSMwrap works for me, but works only on MBR disk, not GPT

[The-Solutor]

Hi I tested CSMwrap on my HP Elitedesk 705 Mini (a Ryzen 2400G machine)

In short that machine still has its own CSM support, but for some reasons, if I enable it and I disable Hyper-V (via a BCD parameter) the VGA driver isn't loaded correctly.

I tried everithing w/o any success.

I have either to enable Hyper-V or disable the native CSM to have the VGA working correctly.

Then I decided to try CSMwrap and IT WORKS.

Native CSM is disabled and I can boot with or w/o Hyper-V at will.

But I noticed that I can boot only from the SATA disk (which is MBR) but not from the NVME (which is obviously GUID).

Not a huge problem for me given the OSes installed in the NVME disk are still bootable via an entry in the SATA BCD, but still I need two disks to get all the thing working.

So I ask, if this is supposedly the normal working way of CSMwrap, or there is a bug that prevents booting from a GUID disk if a MBR one is attached?

To be clear the NVME disk is shown pressing ESC, but if I select to boot from it CSMwrap tells me that no bootable device is found.

Aside that the USB management isn't rock solid, sometimes the keyboard is dead during boot time, sometimes it works correctly.

P.S. for the record on that machine I tested Win 7 x64 (works perfectly) Win XP and Vista (either 32 or 64 bits) they attempt to boot but then throw the infamous non ACPI compliant error (even with a patched acpi.sys driver)