Hi doct0rHu,
thanx for the link! I think this points to the right direction. So, the problem seems to be that the kernel module i915 is compiled into the kernel and so it cannot be blacklisted as a loaded module. This makes absolutely sense for an intel centric distribution:
cat /lib/modules/$(uname -r)/modules.builtin
…
kernel/drivers/gpu/drm/i915/i915.ko
…
the problem now is, how to remove / prevent the module being loaded. This needs to be done in systemd.boot and not in grub. I mounted efi to boot and edited Clear-linux-native-5.0.18-767.conf but couldn’t find a way to prevent loading the i915.
Maybe someone has a hint for an kernel option in systemd.boot to prevent loading the module?
Cheers