![]() If you have problems getting your USB printer to work, you can try blacklisting the usblp kernel module: If you find out this is the only way to fix a remaining issue please report this upstream to the CUPS bug tracker and maybe also get in contact with Till Kamppeter (Debian CUPS maintainer). Warning: As of cups version 1.6.0, it should no longer be necessary to blacklist the usblp kernel module. It works very well for simple printers, but for multi-function devices (printer/scanner) it is not suitable and manufacturers like HP supply their own backends. Reading the same device file allows bi-di access, at least for things like reading out ink levels, status, or printer capability information (PJL). It is simple: data is sent to the printer by writing it to a device file as a simple serial data stream. USB printers can be accessed using two methods: The usblp kernel module and libusb. This set is matched from a default set of media sizes ="yes" Conflict with usblp Note: CUPS provides IOS clients only with a set of main media sizes. ![]() ![]() In addition, the system-default paper size should be configured correctly. The best way to get ISO media types is to set DefaultPaperSize in /etc/cups/nf to:įor ISO. Proper URF/urf-supported values for image/urf.Īs a side-effect of the new ready media propagation IOS clients may show wrong media types (e.everywhere but North America which uses Letter, etc.) Default list is based on locale (A4, etc. New ReadyPaperSizes directive that specifies the "loaded" (ready) media for each printer the actual list is based on the supported media sizes for the printer, and allows the user to pick a size from a short list.The following list of new functions has been taken from CUPS release note: ![]() This obsoletes the need for Avahi service files for propagation of CUPS shared printers to mobile devices. It includes also limited support for huffy iOS clients. (Discuss in Talk:CUPS/Troubleshooting)ĬUPS now officially supports AirPrint and Mopria clients (including Windows 10) by reporting required attributes and DNS-SD TXT record keys. The new behavior should be already documented outside the troubleshooting page. Issues Relating to Upgrade 2.3.3 -> 2.4.0 The PPD version is not compatible with gutenprintĪnd restart CUPS (as pointed out in gutenprint's post-install message). If Avahi is being used, ensure that Avahi's hostname resolution is working.Īlternatively, replace the hostname used in the URI with the printer's IP address. Then the hostname 'BRN_020554' needs to resolve to the printer's IP from the server running CUPS. if your printer's connection looks like this: On networked printers, you should check that the hostname in the printer's URI resolves to the printer's IP address via DNS, e.g. Copy down the information displayed, click 'Modify Printer' to proceed to the next page(s), and so on.Īll jobs are "The printer is not responding" To check the printer's settings go to Printers, then Modify Printer. Using the CUPS web interface, go to Printers > Delete Printer. If it does not yield any useful hints to what is the source of the issue, delete the printer and add it again. If all jobs sent to the printer become "stopped", first check the error log at /var/log/cups/error_log. Reason: This seems a rather brute-force way of fixing this maybe the printer is simply disabled? (Discuss in Talk:CUPS/Troubleshooting) To use the new configuration, copy /etc/cups/ to /etc/cups/nf (backup the old configuration if needed) and restart CUPS to employ the new settings. Messages such as "404 - page not found" may result from trying to manage CUPS via localhost:631, for example. The chances are that a new configuration file is needed for the new version to work properly. Issues that appeared after CUPS and related program packages underwent a version increment CUPS stops working Print a document and watch error_log to get a more detailed and correct image of the printing process.
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