Hello Erwin,
Thanks a lot for work-around advise ;)

Sorry for late answer but I just read it and give a try to "Disabling 
paravirtualization in virtualbox acceleration"
(i.e. VBox GUI, in the 'Settings...' of the VM, go to 'System' panel than in the 'Acceleration' tab select 'None' as 'Paravirtualization Interface' ;))

This help me to install like this a Debian-12.5 DVD as a simple SSH server on 
VBox release is 7.0.18 ;)

For what is weird: once the installation is completed , I can switch back the 'Paravirtualization Interface' to 'Default' ( even with 'Secure boot' enabled ;) )

Thanks a lot again,
Rudy S.

On Wed, 31 May 2023 12:04:04 +0200 Erwin Van de Velde 
<erwin.vandeve...@gmail.com> wrote:
Hi,

Encountering the same issue, I can confirm it still persists in RC4.
However, digging a bit deeper with the error I found on dmesg: "x86/PAT:
bterm:260: map pfn expected mapping type uncached-minus for ..., got
write-combining", I found this workaround:
Disabling paravirtualization in virtualbox acceleration or switching it to
legacy results in a properly booting installer.

Kind regards,
Erwin

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