Bug#935945: linux-image-5.2.0-2-amd64: does not load signed kernel modules when UEFI Secure Boot is enabled

[Sven Willner]

I also have this problem and, unfortunately did not find this bug report
earlier and opened a duplicate in #940181. As noted there, I believe the
issue can be fixed by setting CONFIG_SECONDARY_TRUSTED_KEYRING=y in the
kernel config.