Comment 4 for bug 1797717

Right now in 19.10, /lib/systemd/system/fstrim.service runs /sbin/fstrim --fstab --verbose --quiet , which doesn't cause the service to report these errors. According to the fstrim man page, for the --fstab option: "Errors from filesystems that do not support the discard operation, read-only devices and read-only filesystems are silently ignored."

So, I consider this fixed now. Feel free to close the issue.