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[Bug 1500636] Re: commands passed to cups fail. File missing


This bug was fixed in the package system-config-printer -

system-config-printer (1.5.7+20150819-0ubuntu3) wily; urgency=medium

  * debian/patches/37_command-file-buffering.patch: Fixed buffering
    problem which prevented command jobs (head cleaning, nozzle check
    page, ...) from being sent correctly to CUPS (LP: #1500636).

 -- Till Kamppeter <till.kamppeter@xxxxxxxxx>  Sat,  3 Oct 2015 09:17:25

** Branch linked: lp:ubuntu/wily-proposed/system-config-printer

** Changed in: system-config-printer (Ubuntu)
       Status: Fix Committed => Fix Released

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  commands passed to cups fail. File missing

Status in system-config-printer package in Ubuntu:
  Fix Released

Bug description:
  xubuntu 15.04  64 bit
  system-config-printer 1.5.6

  when I click the button "Print self test page", I expect the printer to produce a self test page
  instead I get error "client-error-bad-request" and no self test page.
  the cups error log has the entry
  Print-Job client-error-bad-request: No file in print request.

  Note that I can get the printer to generate the self test page by
  printing a command file from terminal.

  Added 3rdOct2015
  The problem seems to be due to default buffering of the temporary command file. I can fix the problem by changing the buffering to buffer 1 line.

  in file printerproperties.py
  I changed the line 1232
           with tempfile.NamedTemporaryFile(mode='wt') as tmpfile:
          with tempfile.NamedTemporaryFile(mode='wt',buffering=1) as tmpfile:
  and now the command file sending works for me.

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