As our post just crossed in terms of time and as I had amended my post, I will simply copy part, which I seem to have added, while you already had replied, into this post now:
Just noticed in your initial inxi report, posted yesterday:
Code: Select all
System: Host: Inspiron Kernel: 4.15.0-76-generic x86_64 bits: 64 Desktop: Cinnamon 4.2.4 Distro: Linux Mint 19.2 Tina
Have you perhaps been affected by this reported bug, which seems to happen on Cinnamon systems only (if it happens at all):
upgrade 19.2 to 19.3 breaks on mintupdate #598
During upgrade from LM 19.2 Cinnamon to LM 19.3 Cinnamon, mintupdate first wants to upgrade itself to version 5.5.9. But once this has happened, mintupdate no longer starts up and as a consequence never completes the upgrade from LM 19.2. to LM 19.3
This might match your situation.
This would bring us to gm10's second approach of solving the issue from that thread mentioned in my previous post:
I guess gm10 forgot to mention: Once done, reboot, please.