Pedro, thank you for the hint, I'll try if that works as a workaround for me :-). I though the module build would disable secure boot since a dialog for a password for disabling pops up.
But it remains the question to me what changed from kernel-4.4.0-18 to 4.4.0-21 that somehow broke the wl module loading process. Maybe it's that disabling that does not work anymore and if you disable security boot in BIOS you come around this?
Pedro, thank you for the hint, I'll try if that works as a workaround for me :-). I though the module build would disable secure boot since a dialog for a password for disabling pops up.
But it remains the question to me what changed from kernel-4.4.0-18 to 4.4.0-21 that somehow broke the wl module loading process. Maybe it's that disabling that does not work anymore and if you disable security boot in BIOS you come around this?