Archive for the 'Techie stuff' Category

Avahi support in CUPS

Friday, December 24th, 2010

It’s been a long time coming but I’ve finally managed to get native Avahi support implemented in CUPS. This means that CUPS will now advertise its printers using Bonjour. The CUPS dnssd backend can also discover Bonjour print queues. At the moment it isn’t automatically discovered by CUPS, but I hope to get that part done once this work is accepted upstream.

The package with this patch is cups-1.4.5-9.fc15.

Merry Christmas!

Choosing the best printer driver

Tuesday, October 26th, 2010

In an ideal world there would be no need to choose which printer driver to use, and all printers would use the same driver (or, say, one driver for raster images, and another for vectors).  That’s the goal of IPP Everywhere.  In the mean while, there is often a choice of different drivers to use.  CUPS leaves this decidedly up to the user.  The foomatic database contains a list of which drivers are “recommended” for each printer, although this is limited to old-style drivers that use the foomatic engine such as hpijs and built-in ghostscript drivers, and to PostScript PPD files.  It cannot recommend native CUPS drivers such as those contained in Gutenprint and HPLIP (hpcups).

(more…)

Ricoh supplies Device IDs

Monday, May 17th, 2010

I’ve mentioned before about how the automatic printer driver installation feature in Fedora 13 requires IEEE 1284 Device IDs to be provided by both printer devices and printer drivers so they can be matched together.  I gave a presentation about this at the OpenPrinting Summit in April.

Since then I’ve been helping Ricoh fix the pieces that needed fixing so that their printers will work with automatic printer driver installation.  Impressively, Ricoh has sent me the Device IDs for 785 different devices.  This brings the number of drivers without IDs down to 2,605, or just over 25% of the drivers we ship.  Previously this was nearly 40%.

Not only that, but now the Fedora 13 cups package retrieves Device IDs from Ricoh network printers that do not have support for the Printer MIB standard.  It does this by sending an SNMP query for the “private” Ricoh OID that holds the Device ID string.

system-config-printer now has a mailing list

Wednesday, April 21st, 2010

For those of you interested in participating in system-config-printer development, I invite you to join the new mailing list.

Firewall adjustments

Thursday, April 15th, 2010

I’ve just released version 1.2.1 of system-config-printer.  One of the changes is that it now uses the D-Bus API of the Fedora firewall tool to actually make firewall adjustments that it needs.