Problems booting after upgrade to 22.04

[Schwarzer Kater]

[…] I assume, I already have an EFI partition and a swap partition. Does that mean, I can skip Steps 5A and 5B from the instruction? What about Step 5D, do I also have to skip that because I already have a boot loader?

You probably have a partition for /boot/efi, but probably no swap partition (*Ubuntu has been using swap files instead for a while now). You can just check this in step 5 without having to change anything.

If there already is an EFI partition you can skip step 5A, if not create one that is at least 300MB in size, not just 256MB (I mostly use 304 or 320MB - reason, without being an actual technical reason: some other Linux distributions than *Ubuntu - actually their installer - demand an EFI partition size of at least/greater than 300MB, so you will be on the safe side for the future).

You can skip step 5B as Kubuntu will automatically create a swap file in your / directory - sufficient for your use case I presume.

If you want to place your mount points manually (that is what the whole step 5 is about) point /boot/efi to the EFI partition in step 5D. If is already there don't erase it, just point to it - otherwise your Windows boot loader will be gone!

I hope this helps.

[Michel Frey]

It seems, this has worked. At least I was just able to login to the newly installed Ubuntu and after reboot to choose the existing windows partition which still works as before. Thank you very much.

[Austin38]

My plan is to follow this instruction https://www.ubuntubuzz.com/2022/07/h...sk-method.html
It's probably what I want (leave the existing windows partition unchanged, install Kubuntu to the partition where currently the broken one is installed). Because I already have this dual boot installation I assume, I already have an EFI partition and a swap partition. Does that mean, I can skip Steps 5A and 5B from the instruction? What about Step 5D, do I also have to skip that because I already have a boot loader?

If you already have an existing dual boot installation with an EFI partition and swap partition, you can likely skip Steps 5A and 5B. However, you'll still need to follow Step 5D to ensure that the boot loader is properly configured.