On 08/02/2026 at 16:26, Johannes Linkels wrote:
However, I have seen older installation videos using debian-13.x (unknown major revision) using the graphical installer which did not show this behavior. It might be this bug is only in the text based installer.
How do you know the EFI system partition did not already contain a FAT filesystem in these videos ?
By "graphical installer", do you mean the debian-installer graphical front end launched in the boot menu or the Calamares installer launched in a Debian live session ?
Debian-installer works the same with the text and graphical front ends. Calamares is a totally different tool.
The workaround is to leave the partitioner and perform a manual format in FAT on the EFI partition and return to the installation process. I am not sure if this is possible by entering the Ash shell provided by the installer.
It is of course possible, mkfs.fat is available in the installer shell. You can also set the partition "use as: FAT32 filesystem", commit, then set it "use as: EFI system partition".
