You have been subscribed to a public bug:
after install nvidia-drivers-396 and virt-manager, virtualbox package and
reboot system, in boot my system show to me this message: "pkcs #7 signature
not signed with a trusted key" and system not booting(freeze maybe)
I purged nvidia-driver-396 and virt-manager, virtualbox packages in recovery
mode, The problem was resolved temporarily...
i use ubuntu 18.10 development branch, ubuntu is UEFI boot.
same problem when upgrading ubuntu 18.04 to 18.10. and now when
reinstalling ubuntu 18.10!
** Affects: nvidia-graphics-drivers-390 (Ubuntu)
Importance: Undecided
Status: New
** Tags: bot-comment cosmic
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pkcs #7 signature not signed with a trusted key
https://bugs.launchpad.net/bugs/1791697
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which is subscribed to nvidia-graphics-drivers-390 in Ubuntu.
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