This should have worked.
The boot selection method via BIOS-boot-menue is independant from any installation on other HDD's, therefore no need to edit foreign grub configurations.

I probably would temporarily disconnect the Ubuntu-disk (physically), and then try to boot / chroot / rescue / reinstall.

PS:
(((the OP knows, but just to name it - the BIOS-boot-menue: Power-on the PC, it beeps, press once [F12_in_my_case] and the HDD selection appears.)))

Get black screens after grub too.
Newer Intel graphics (11-something?) seem a bit "picky" in what they display and what not. One feature is to not support BIOS boot anymore (black screen on non-efi-boot). As far as I remember, temporary using an exiisting PCIe graphics card showed boot messages.

Another thing is, when switching to a text-console, both screens showin the same content. No idea, whether this is as it should be.

For sound with alsa you probably need the "AppImage" - not the version form the debian repository.
Not sure why this is, but it was the case some months ago and did not re-check since then.

Of course I do not know the print outs, just want to remind on technical limits.
A current inc-jet printer can produce photo alike results. A laser printer is good for something with sharp edges like text or lines, gradients are ... difficult / not looking good. The colours itself are non-natural and loud.

At my work is a Brother network laser printer. No installation at all - appeared in cups (no idea how, it's a shame) and is simply working.
A bit colour tweaking might be nice.

I would like to add:
A bad contact may/can be cured by pulling the connectors off and on again.
Unpluging and plug in again any reacheable cable (and card) may fix the problem. If you don't know exactly what you are doing, just be careful with electrostatic charges, don't use too much force on connectors; it's a bit like Lego, use your brain, unplug main power of course; everything should be straight and fitting, otherwise it is incorect.
(I still think the parrot is probably dead https://www.youtube.com/watch?v=vZw35VUBdzo , but) It's worth a try, if you feel comfortable doing so.

The list is quite enlarged when using addional wildcards (incl Suggests, Reverse Depends, etc). Just typed it, becasue the original list was to small.

apt rdepends *zeitgeist*

Edit: Typo (hm .. no spell checker when using this computer. There might be more)

Sadly, no simple solution.

The current problem might be: The 3D-acceleration points to the wrong library after switching the SSD - didn't had that in mind at the first answer, sorry.
I'm not exactly sure about the command, there might be other recommended tools or command lines. A symbolic link must be updated to match the graphic card.
sudo update-alternatives --config glx

Update:
The original post was not very precise: xrdp is the problem.
And I found a somewhat dirty hack to fix the keyboard layout.

The loaded keymap is:

sudo cat /var/log/xrdp.log | grep km-000 | tail -1
[20230106-12:31:06] [INFO ] Loading keymap file /etc/xrdp/km-00000409.ini

Which is "us". "de" is "km-00000407.ini".
Backup and copy:

sudo gzip /etc/xrdp/km-00000409.ini
sudo cp /etc/xrdp/km-00000407.ini /etc/xrdp/km-00000409.ini

After logging in, it is still a "us" keymap, but switching to "de" now works

setxkbmap de

Would prefer a cleaner solution, but at least it works by now.

Edit: Will mark it as solved. And look for another remote X session solution.

Hopefully it is not to late!
Billy Talent for the rescue?
https://www.youtube.com/watch?v=hNrj4reWIgY

I'm happily running daedalus, repo is

deb http://deb.devuan.org/merged daedalus main contrib non-free

The output of neofetch regarding OS, Kernel and Shell is equal.

Not exactly sure about the OS name "daedalus/ceres".
Packages are tested in ceres, before integrated in daedalus.

(edit: typo)

Hi,
changing the release is always the same.

edit /etc/apt/sources.list - replace ceres with chimaera

apt update
apt upgrade
apt dist-upgrade 

To downgrade or make apt install older packages over newer:

cat /etc/apt/preferences
Package: *
Pin: release n=chimaera
Pin-Priority: 1001

I messed the file up here https://dev1galaxy.org/viewtopic.php?id=5208
apt -s whatever does a dry run.