After installing xanmod kernel (with AptURL from the official site) on my Laptop and booting into the newly installed kernel I received following error message:
Loading Linux 5.15.24-xanmod1 ...
error: /boot/vmlinuz-5.15.24-xanmodi has invalid signature.
Loading initial ramdisk ...
error: you need to load the kernel first.
Press any key to continue...After that I removed the xanmod kernel using synaptic (synaptic removal window)
And installed it again this time following step by step this tutorial (logged in as root user in a Terminal)
I still get the same error message saying xanmod1 has an invalid signature.
I have following kernels installed: (output of dpkg -l | grep linux-kernel)
ii linux-image-5.11.0-27-generic 5.11.0-27.29~20.04.1 amd64 Signed kernel image generic
ii linux-image-5.13.0-30-generic 5.13.0-30.33~20.04.1 amd64 Signed kernel image generic
ii linux-image-5.15.24-xanmod1 5.15.24-xanmod1-0~git20220216.6c16085 amd64 Linux kernel, version 5.15.24-xanmod1
ii linux-image-generic-hwe-20.04 5.13.0.30.33~20.04.17 amd64 Generic Linux kernel image1 Answer
By disabling Secure Boot in UEFI Settings I resolved the issue and can now finally boot into the custom kernel installation!
Output of cat /proc/version:
Linux version 5.15.24-xanmod1 (root@mascote) (gcc-11 (Debian 11.2.0-12) 11.2.0, GNU ld (GNU Binutils for Debian) 2.37) #0~git20220216.6c16085 SMP Wed Feb 16 15:00:21 UTC 2022
