CUPS 1.5.0 Released With Several New Features
Written by Michael Larabel in Free Software on 25 July 2011 at 08:11 PM EDT. 3 Comments
For those still in a non-paper-less world, CUPS, the printing system for Linux, Mac OS X, and other operating systems, has been updated. CUPS 1.5 was just officially released today and its release, which is largely developed by Apple, comes just shortly following the Mac OS X 10.7 Lion release. CUPS 1.5 brings several new features and changes to the printing world.

Among the changes to find in CUPS 1.5 are compatibility fixes, support for SSL/TLS X.509 certificates, an updated PDF filter, a new PWG raster filter for IPP Everywhere printer support, a cups-exec helper program, scheduler enhancements, the SCSI back-end has been stripped, and the HP-GL/2 is no longer included.

The CUPS 1.5.0 announcement was made at There doesn't appear to be a detailed change-log on the project's web-site, so the change-log from the source package is included below for your convenience.


- Documentation updates.
- Localization update (STR #3865)
- Needed to limit TLS to v1.0 on some versions of Mac OS X.
- The snmp backend did not work with some printers.


- Compile fixes (STR #3849, STR #3850)
- The scheduler didn't check for empty values for several configuration directives (STR #3861)
- ipptool didn't generate valid XML when a test was skipped.
- Added additional error checking to the 1284 device ID code (STR #3858)
- Fixed some compatibility issues migrating from the old usblp backend to the libusb backend (STR #3860)
- Fixed the wake-from-sleep printing behavior on Mac OS X.
- The scheduler incorrectly allowed jobs to be held from a terminating state.
- The cups-driverd program could crash when a PPD was renamed.
- The dnssd backend took too long to discover printers on large or busy networks with the new default timeout used by lpinfo and the web interface. This resulted in "lost" printers.


- Documentation updates.
- Localization updates (STR #3845)
- Compiler warning cleanup.
- Fixed PIE support for Linux (STR #3846)
- Made httpSetTimeout API public and use it in the IPP backend to avoid timeout errors.
- The scheduler incorrectly set the "authenticated" printer-type bit for remote queues using authentication.


- The CUPS library now supports per-connection HTTP timeouts and callbacks.
- The CUPS library now supports (limited) SSL/TLS X.509 certificate validation and revocation (STR #1616)
- Updated the PostScript filter to support IncludeFeature in more circumstances (STR #3417)
- The schedule did not correctly parse some IPv6 addresses and masks in the cupsd.conf file (STR #3533)
- Fixed a case-insensitive string comparison issue for locales that do not treat "I" and "i" as equivalent (STR #3800)
- The scheduler reported an incorrect job-printer-uri value when sharing was not enabled (STR #3639)
- The scheduler now allows the ServerAlias directive to contain multiple hostnames separated by spaces or commas (STR #3813)
- The scheduler now sets the process group for child processes and manages the group (STR #2829)
- Fixed some minor issues discovered by a Coverity scan (STR #3838)
- The scheduler now more carefully creates and removes configuration, cache, and state files (STR #3715)
- The lpadmin command now allows default option values to be deleted (STR #2959)
- The lpadmin command now allows the cupsIPPSupplies and cupsSNMPSupplies keywords to be set in a PPD file (STR #3825)
- Moving a held job no longer releases it (STR #3839)
- Restored support for GNU TLS and OpenSSL with threading enabled (STR #3605)
- Fixed a confusing error message from cups-polld (STR #3806)
- Increased the default RIPCache value to 128MB (STR #3535)
- MIME errors are now routed to the error_log file (STR #2410)
- Updated PDF filter to support new Ghostscript ps2write device (STR #3766)
- Updated PDF filter to support new Poppler option to preserve page sizes in PDF files when the user has not selected a particular media size (STR #3689)
- Added new PWG Raster filter for IPP Everywhere printer support.
- Added job-uuid, printer-uuid, and subscription-uuid attributes.
- Added support for the cupsSingleFile PPD keyword.
- Dropped support for the printer-state-history attribute (STR #3654)
- Added support for a new cupsIPPSupplies keyword in PPD files to allow drivers to disable IPP supply level reporting.
- Added support for a new cupsFilter2 keyword in PPD files to allow for the propagation of the actual MIME media type produced by a filter.
- The scheduler did not always get the correct Kerberos username when authenticating (STR #3670)
- Added new cupsRasterOpenIO function and CUPS_RASTER_WRITE_PWG to the CUPS imaging library to support printing to IPP Everywhere raster printers.
- The scheduler now provides default values for the pages-per-minute and pages-per-minute-color attributes for PPD files that lack a Throughput keyword.
- Email notifications did not work on Mac OS X.
- The cupstestppd program now shows an error for files missing a CloseGroup keyword (STR #3668)
- Name resolution errors no longer cause queues to stop (STR #3719, STR #3753)
- Added a new cups-exec helper program that applies security profiles to filters, port monitors, backends, CGI programs, and mini-daemons.
- The web interface can now be disabled using the WebInterface directive in cupsd.conf (STR #2625)
- The scheduler now provides privacy controls for jobs and subscriptions (STR #2969)
- Added new cupsArrayNew3 API which offers memory management of array elements.
- Added several new color spaces to the CUPS raster format (STR #3419)
- The Validate-Job operation now uses the same policy as Print-Job by default.
- CUPS now uses iconv to implement all of its character encoding support (STR #3097)
- The scheduler now implements the Cancel-Jobs, Cancel-My-Jobs, and Close-Job operations along with the job-ids operation attribute from PWG 5100.11.
- The main CUPS header () no longer includes the PPD header ().
- The scheduler and CUPS API now support the print-quality job template attribute.
- The scheduler no longer supports the old Mac OS X Server quota plugin.
- The scheduler now allows writing to /Users/Shared from print filters on Mac OS X.
- CUPS no longer supports the old ~/.cupsrc or ~/.lpoptions files from CUPS 1.1.x. The ~/.cups/client.conf and ~/.cups/lpoptions files that were introduced in CUPS 1.2 must now be used.
- The ipptest tool is now a first-class user program and has several improvements along with new documentation (STR #3484)
- The cupstestppd tool now warns about non-unique filenames and provides a way to ignore all filename warnings.
- Dropped support for the recoverable: and recovered: message prefixes.
- The scheduler now requires that filters and backends have group write permissions disabled.
- The PPD compiler now checks for overlapping filenames when writing PPD files.
- The HP-GL/2 filter is no longer included with CUPS (STR #3322)
- The SCSI backend is no longer included with CUPS (STR #3500)

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Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and automated benchmarking software. He can be followed via Twitter or contacted via

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