Bug#940615: grub-efi-amd64: On upgrade to buster apt fails to install shim-signed-common and shim-signed due to grub-install fail

[Steve McIntyre]

On Tue, Sep 17, 2019 at 08:09:02PM +0100, Tony wrote:
>Package: grub-efi-amd64
>Version: 2.02+dfsg1-20
>Severity: important
>
>Dear Maintainer,
>
>I have just upgraded to buster.  apt full-upgrade failed.  Subsequently
>further use of apt fails so I don't seem able to make further changes
>with apt,  such as purge removed packages.  It appears that the problem
>is in install-grub which is failing.
>
>I suspect this is a problem I have had on earlier releases where
>grub-install failed because I have the efi partition on raid 0.  However
>on previous versions although grub-install did not complete it did not
>return an error so software calling it continued.  This meant that apt
>could continue.

So you're running in a known-unsupported configuration. In the past,
Grub was buggy and would ignore errors. In that situation, you could
get to the point where you'd think that an upgrade had worked but your
system would not boot. At least now you get to see the errors.

Please fix your configuration. There is no bug here IMHO.

-- 
Steve McIntyre, Cambridge, UK.                                steve at einval.com
"This dress doesn't reverse." -- Alden Spiess