This is an Asus Q202E laptop.
Package management is normal and stable:
$ sudo apt -f install
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
SecureBoot is disabled by me in the UEFI settings:
$ mokutil --sb-state
SecureBoot disabled
I apparently did add the Canonical certificate at some point:
$ mokutil --list-enrolled --db | egrep '(Issuer|Subject):'
Issuer: CN=ASUSTeK Notebook SW Key Certificate
Subject: CN=ASUSTeK Notebook SW Key Certificate
Issuer: CN=ASUSTeK MotherBoard SW Key Certificate
Subject: CN=ASUSTeK MotherBoard SW Key Certificate
Issuer: C=US, ST=Washington, L=Redmond, O=Microsoft Corporation,
CN=Microsoft Corporation Third Party Marketplace Root
Subject: C=US, ST=Washington, L=Redmond, O=Microsoft Corporation,
CN=Microsoft Corporation UEFI CA 2011
Issuer: C=US, ST=Washington, L=Redmond, O=Microsoft Corporation,
CN=Microsoft Root Certificate Authority 2010
Subject: C=US, ST=Washington, L=Redmond, O=Microsoft Corporation,
CN=Microsoft Windows Production PCA 2011
Issuer: C=GB, ST=Isle of Man, L=Douglas, O=Canonical Ltd., CN=Canonical
Ltd. Master Certificate Authority
Subject: C=GB, ST=Isle of Man, L=Douglas, O=Canonical Ltd.,
CN=Canonical Ltd. Master Certificate Authority
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You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1800750
Title:
Error message during upgrade: "Error writing key update: Permission
denied"
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/secureboot-db/+bug/1800750/+subscriptions
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