Ubuntu 10.04 32 bit. I have two USB printers. If both printers are off at boot time CUPS does not start and turning on a printer fails to start it. If a printer is on at boot time then CUPS starts and both printers are available (even though one of them may be turned off). This was not a problem on 9.04 and I suspect that it wasn't initially a problem on 10.04 so one of the updates may have broken something.
Ubuntu 10.04 32 bit. I have two USB printers. If both printers are off at boot time CUPS does not start and turning on a printer fails to start it. If a printer is on at boot time then CUPS starts and both printers are available (even though one of them may be turned off). This was not a problem on 9.04 and I suspect that it wasn't initially a problem on 10.04 so one of the updates may have broken something.