My thought about the latest Manjaro updates screwing up my Linux Mint was correct. Thankfully I had a Manjaro clonezilla image from 7/13 (10 days ago). Restoring that image fixed my Linux Mint screen resolution.
Of course now I’m back to square one and still need to apply ~2GB of updates. So that will be 4GB of downloads! Why couldn’t it fail on a 50MB update?
I still don’t know why Manjaro feels it needs to fix grub entries for other OS’s. In doing a little research I found this, and wonder if it would help?
In /etc/default/grub
GRUB_DISABLE_OS_PROBER=true
- This entry is used to prevent GRUB from adding the results of os-prober to the menu. A value of “true” disables the os-prober check of other partitions for operating systems, including Windows, Linux, OSX and Hurd, during execution of the update-grub command.