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[Till Kamppeter <1490055@xxxxxxxxxxxxxxxxxx>]

The problem here is

https://www.cups.org/str.php?L4725

and this one I have fixed in the Ubuntu CUPS package, in version
2.1.0-4ubuntu1.

** Package changed: chromium-browser (Ubuntu) => cups (Ubuntu)

** Changed in: cups (Ubuntu)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/1490055

Title:
  Print dialog hangs when PPD file in /etc/cups/ppd/ is not world-
  readable

Status in cups package in Ubuntu:
  Fix Released

Bug description:
  It seems that the print dialog of the Chromium browser (the browser's
  own one with the preview) tries to read the PPD file (the file
  containing the printer's properties and the printer-specific user-
  settable options) in /etc/cups/ppd/ directly to be able to display the
  dialog with correct options and correct preview. The correct method
  (which is also actually used by the GTK print dialog) is to use the
  API of the CUPS library or IPP requests to the CUPS daemon.

  As it depends on the configuration of CUPS whether the PPD files in
  /etc/cups/ppd/ are world-readable and so readable for desktop apps run
  by ordinary users, it easily happens that the direct reading does not
  work. Therefore it is very important that print dialogs are properly
  done.

  What I am observing currently is that if the PPD of the selected
  printer is not world-readable the print dialog hangs and is not able
  to display the preview and the options. The user can only click the
  link to use the standard GTK dialog.

  See also

  https://www.cups.org/str.php?L4703

  about the world-readability of PPD files.

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