Loading via boot.kernelModules ensures they're loaded after initrd, by which time RP1 PCIe southbridge is initialized (~12s). This avoids the 'Cannot find any crtc' error from premature probe. - boot.kernelModules: explicit vc4 + panel_cwu50 (stage-2) - boot.initrd.kernelModules: only ocp8178_bl (backlight)