UC20 gadget snap shows /EndEntire during booting

[tsunghanliu]

The PC gadget snap (rev 147) shows /EndEntire during booting, but rev 132 doesn't. This behavior will make the boot log been cleared if the system has quiet splash on kernel cmdline.

I used this image and refresheshed all snaps to the latest version.

$ cat /run/mnt/ubuntu-seed/.disk/info 
20230904.2

$ snap list
Name       Version          Rev    Tracking       Publisher   Notes
core20     20240416         2318   latest/stable  canonical✓  base
pc         20-0.4           147    20/stable      canonical✓  gadget
pc-kernel  5.4.0-189.209.1  1915   20/stable      canonical✓  kernel
snapd      2.63             21759  latest/stable  canonical✓  snapd

If I overwrite grubx64.efi on the ubuntu-seed partition with the one of PC gadget rev 132, the issue won't happen.

I'm not sure if the grub is the same as the stock Ubuntu, so I file this issue here first. I can file a grub issue on Luanchpad if necessary.

[tsunghanliu]

I filed a Launchpad bug at https://bugs.launchpad.net/ubuntu/+source/grub2-unsigned/+bug/2075579
Please feel free to chime in if there's any suggestions