FAQ: Ubuntu 25.04 on Snapdragon X Elite

Hi all, small update on our stubble progress!

We now have a fully stubble enabled ISO that should work on all machines we had working with our old solution. The ISO is available in the usual place.

:warning: Don’t forget to tick the “install additional drivers” option in the installer, that is still needed. If this works for everyone the last thing missing is removing the flash-kernel dependency from ubuntu-x1e-settings.

Currently the dtbs do still get installed to /boot but they aren’t actually used. It should be safe to rm -rf /boot/dtb* && update-grub and apt remove flash-kernel since the dtbs are now loaded by stubble from the kernel bundle. If I get enough feedback saying that worked I will reupload the package with the dependency removed.

If you want to load a custom device tree you have to add it to grub.cfg manually AND pass stubble.dtb_override=true on the kernel command-line. Adding debug to the kernel command line make stubble print which device-tree was used.

I am not aware of any machines being broken by stubble right now. There was a problem with a few specific versions of the Lenovo T14s that we fixed since. Please reach out and let us know if the latest ISO/kernel don’t work (and previously did) on your machine so we can get it fixed before 25.10!
There has been one report of missing initramfs modules that cause the screen to stay dark for the disk encryption prompt, we are working on getting that fixed.

We also added a few new goodies in our latest kernel such as HDMI support on the T14s and initial webcam support.

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