Turns out we didn't even need to modify the kernel for this. By choosing simplefb and the 'tiny' DRM drivers for initrd, we get simpledrm.ko as it existed in our older kernels...
https://code.launchpad.net/~vanvugt/ubuntu/+source/initramfs- tools/+git/initramfs-tools/+merge/462482 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1965303 Title: Migrate from fbdev drivers to simpledrm and DRM fbdev emulation layer To manage notifications about this bug go to: https://bugs.launchpad.net/gdm/+bug/1965303/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs