Ubuntu 25.10 on Snapdragon 8cx Gen 3

[Norm24]

Maybe take a look in this thread?Not sure if it will offer the info you need but might still be worth taking a look.

FAQ: Ubuntu 25.04 on Snapdragon X Elite

Hi, for booting el2 you need the stubble.dtb_override=false option in the kernel cmdline. This prefers the externally given dtb even if a match is found in the stubble space (which is wrong for EL2).