If you upgrade ubuntu 18.04 to 22.04 via „do-release-upgrade“ and you have installed brother laser printer drivers, the whole „cups“ printing system will FAIL on print and log missing „filters“ at cups log.
The „lp“ printer output piped into nirvana!
- Check at /usr/lib/cups/filter/ for the filter files
- Reinstalls cups by deinstall/reinstall with –purge config option
- Check again /usr/lib/cups/filter/
- Copy all „brto*“ missing filter files from other old working PC to /usr/lib/cups/filter/
- Restart PC, cups works now.
- The Filter files are not inside Brother Driver Packages (deb)!
Seen on a Systems with Ubuntu Small/Mini Setup!
I will check next days this bug for depending packages!