@drdiddlybadger @neonred I've had results with chmod -r +x /
@Underwaterbob @Johanno Have you considered using a Raspberry Pi as a printer server? It might not be ideal, but - if it (the Pi) is physically connected to your printer - I wonder if it could negate the 30% failure rate?
@beeng @RmDebArc5 I'm not a Mint user, but you can switch it out for an Openbox/Tint2 config pretty easily (I think!).