I haven't been able to test this since the systems I have here don't have any kernel images lying around, but wondering if this patch could help narrow down the cause?
Apply to a (copy) of /usr/bin/unattended-upgrade - possibly put in /usr/local/bin/ so it is called before the package-installed version (don't forget to clear the bash hash cache ("hash -r") first)
I haven't been able to test this since the systems I have here don't have any kernel images lying around, but wondering if this patch could help narrow down the cause?
Apply to a (copy) of /usr/bin/ unattended- upgrade - possibly put in /usr/local/bin/ so it is called before the package-installed version (don't forget to clear the bash hash cache ("hash -r") first)
Then:
sudo /usr/local/ bin/unattended- upgrade --verbose --debug