Dual Boot - wireless hardware not accessible

[Ralf Mardorf]

On Thu, 20 Sep 2018 11:39:42 -0500, Wade Smart wrote:
>DKMS: install completed
>modprobe: ERROR: could not insert 'wl': Required key not available.
>update-initramfs: deferring update

https://askubuntu.com/questions/762254/why-do-i-get-required-key-not-available-when-install-3rd-party-kernel-modules

I never used {,U}EFI Secure Boot in my life. IIUC my BIOS's settings, it
automatically could handle multi-boot of some OS with and other without
{,U}EFI Secure Boot, but I might be completely wrong with this "guess".
My Linux multi-boot doesn't use it at all.

-- 
pacman -Q linux{,-rt{-securityink,-pussytoes,-cornflower,}}|cut -d\  -f2
4.18.8.arch1-1
4.18.7_rt5-1
4.18.5_rt3-1
4.16.18_rt12-1
4.16.18_rt11-1