sunrat wrote: ↑2024-03-20 07:26
Were you able to select to not format the swap partition?
Frankly, I don't remember. Not an issue I get hung up over, as it's easily repaired. Either (i) edit fstab of the other systems or (ii) revert the swap UUID with mkswap -U and edit fstab of the latest installation. As it happens, I recall having to do that for the computer on which I used the Standard Installer, as it was all eight desktops in a test box and I did them one right after the other. Didn't know about the Advanced option, obviously. Have added to my notes.
Edit: I'm spending part of the day learning KVM (my day off), so decided might as well test this as a way to play with the levers. Turns out, no, Calamares does not automatically reformat a swap partition, although it's an option; indeed, default is to Keep (rather than Format). Another thing to know (I'd forgotten). The live sessions have by default re-enabled os-prober. So, as shipped to keep; edit /etc/default/grub to disable.
By the way,
@fwm, if you decide to use the Calamares installer, notice there's an option whether to install Grub to the device (which will put the new system in charge) or the root partition (which will leave the current system in charge). Both options work. If you choose the latter, you need to boot the old system and run update-grub (after enabling os-prober, if not already); the new system won't appear on the Grub menu until you do.