can't delete kernel

Oliver Grawert ogra at
Sat Aug 18 13:10:21 UTC 2018

Am Samstag, den 18.08.2018, 07:47 -0400 schrieb John Carroll:
> Hello all,
> I tried to install a software package and was not allowed.
> /etc/kernel/postrm.d/zz-update-grub:
> /usr/sbin/grub-mkconfig: 12: /etc/default/grub: iommu=soft: not found
> run-parts: /etc/kernel/postrm.d/zz-update-grub exited with return
> code 127

looks like you manually edited /etc/default/grub and made a bad entry
in there ... fix the bad line and run "sudo update-grub"

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