lost wifi, ethernet, docking station with 16.04 kernel signing.

[Tom H]

On Tue, Apr 26, 2016 at 1:26 AM, Peter Silva <peter at bsqt.homeip.net> wrote:
>
> I boot 4.4.0-18 and all the modules insert just fine.
> 4.4.0-19 and later I get the error message.

Please bottom-post.

My apologies. I always assumed that setting the MODULE_SIG* would
force the kernel to check for signed modules in general as well as for
signed modules in the SB case but I had some doubts.

Given your problem, I had the rather silly idea of grepping through
the 4.4.0-21 kernel config for "EFI" and I found
"EFI_SECURE_BOOT_SIG_ENFORCE".

I couldn't find it in my upstream 4.6-rc5 kconfig but I did find it in
an Ubuntu patch, "linux_4.4.0-21.37.diff", and it means "Force module
signing when UEFI Secure Boot is enabled".

Check -18 and -19 for this. It's probably off or non-existent in -18.

So Ubuntu's killed dkms-dependent packages (or otherwise
locally-compiled modules) with SB active - unless you compile and sign
your own stuff.