Hi list, always, on ml, I read for the users problems but rarely for success story so now I'm here for write one! Some time ago my customer ask me for a "system" that simple "print" with printers, after an external command, with different printers and, last but not the least, without common problems that the common Proprietary OS has (who say BSOD? ;) ) After some ideas and tests, with lead to choose a little commercial embedded pc with reduced resources, and, of course Linux! All the printers are connected with one single usb plug and 5 hubs, where there are also the connection with the acquisition board that see witch button are pressed and to the connected print on a specific printer. (Hope that I explain correctly it!) Like now the pc are working on production with.... 24 *different* usb printers connected that simultaneously (more or less)! Some technical info: processor: 800MHz memory: 512MB storage: 1GB flash-ide distro: debian lenny (kernel 2.6.24) Problems seen: There was some problems that I met with the usblp driver for some specific printers, like the unique "backend" name for some Brother (if I remember correctly). The backend assign a unique name for a printer (like usb://Brother HL 2030) and if there are two printers with the same model connected, they cannot be distinguished and only the first respond at the backend. Other was that some other printers "block" the usb, so no other devices can communicate after a print and the only solution found was to "reset" usb (remove the usb modules, like usblp, usbcore, etc...) and re-probe them. However the problems were so less that the benefits, so... good work! From my point of view usb (and usblp) in the linux kernel are the right choice for make a "printing machine"! Michele -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
