On Tue, Apr 16, 2019 at 11:03:40PM +0530, Jugal Mistry wrote:
> I am running a host system with Ubuntu 18.04 and windows 10 with grub
> v2.02 to boot to both os. I did not follow chapter 8.4 as I did not
> want to overwrite my grub config. The boot partion is sda9 (ext2), the
> root partiton is sda10 (ext4). I completed chapter 8.3 Linux-4.20.12
> and completed every step without any errors.
> but when I boot into the system, I get the message :
> vmlinuz-4.20.12-lfs-8.4 has invalid signature
>
> I have completed all the chapters successfully without any errors, I
> have disabled secure Boot in the system bios configuration. here is
> the grub menu entry:
>
> menuentry "LFS on (/dev/sda10)" {
> insmod ext2
> gfxpayload=1280x1024x32,1280x1024
> set root='(hd0,9)'
> linux /vmlinuz-4.20.12-lfs-8.4 root=/dev/sda10 ro single
> }
>
> Thanks
> Jugal Mistry
A quick google for 'vmlinuz has invalid signature' seems to get a lot
of hits, and offers an option with ' ubuntu' at the end! So this is
not uncommon.
Looking quickly, it appears that your system (i.e. UEFI, often
described as 'bios' by manufacturers) is (still) enforcing secure
boot.
But the problem might be with ubuntu - there are threads which
suggest that ubuntu signs its kernels (with a ubuntu key) and
enforces that in its grub. If that is the problem, I have no idea
how to work around it.
ĸen
--
It is said that there are two great unsolved problems in computer
science: naming, cache invalidation, and off-by-one errors.
-- Ben Bullock
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