OK, thanks for the update, Schlomo. I think there is enough information in this report now that it can be send to the programmers. For their ease, I will add a summary here. Please feel free to add any corrections.
----------------------- SUMMARY: Ubuntu version 16.04 and 18.04 Problem is reproducable by the bug reporter. Printer is HP Officejet Pro X476dw MFP. Notes: Printing documents with Hebrew fonts results in low quality with fuzzy lines (default CUPS converts the print job to a 300dpi PS before giving it to the hp driver) Expected behaviour: documents print at 600 dpi Actual behaviour: documents are printing at 300 dpi Additional notes: Bug reporter is in Ubuntu 16.04 but has checked the latest PPD file (v3.18.7) and issue still exists. “The PPD does not define the DefaultResolution parameter which causes CUPS to use a default of 300dpi.” Solution: Add to the PPD for this printer: the DefaultResolution parameter. For example: *DefaultResolution: 600x600dpi ----------------------- -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to hplip in Ubuntu. https://bugs.launchpad.net/bugs/1385055 Title: HP Officejet Pro X476dw MFP prints in 300dpi Status in HPLIP: Incomplete Status in hplip package in Ubuntu: Incomplete Bug description: Running Ubuntu 14.04 running stock hplip 3.14.3 Printer HP Officejet Pro X476dw MFP hp-check -t output is attached Problem: Initially I noticed that printing documents with Hebrew fonts results in low quality with fuzzy lines. After some debugging I was able to trace this down to the fact that by default CUPS converts the print job to a 300dpi PS before giving it to the hp driver: D [24/Oct/2014:07:22:01 +0200] [Job 261] Printer make and model: HP HP Officejet Pro X576dw MFP D [24/Oct/2014:07:22:01 +0200] [Job 261] Running command line for pstops: pstops 261 schlomo hebrew-test.pdf 1 'finishings=3 media=iso_a4_210x297mm output-bin=face-down print-color-mode=color print-quality=4 sides=one-sided job-uuid=urn:uuid:c1da9224-d10b-3c2f-6a99-487121b8864c job-originating-host-name=localhost time-at-creation=1414128121 time-at-processing=1414128121 Duplex=None PageSize=A4' D [24/Oct/2014:07:22:01 +0200] [Job 261] No resolution information found in the PPD file. D [24/Oct/2014:07:22:01 +0200] [Job 261] Using image rendering resolution 300 dpi D [24/Oct/2014:07:22:01 +0200] [Job 261] Running command line for gs: gs -q -dNOPAUSE -dBATCH -dSAFER -sDEVICE=ps2write -sOUTPUTFILE=%stdout -dLanguageLevel=3 -r300 -dCompressFonts=false -dNoT3CCITT -dNOINTERPOLATE -c 'save pop' -f /var/spool/cups/tmp/066575456f596 I was able to fix the problem by adding this resolution setting to the PPD: *DefaultResolution: 600x600dpi As a result the print job is converted at 600dpi instead of 300dpi which leads to the expected good result: D [24/Oct/2014:07:22:33 +0200] [Job 262] Printer make and model: HP HP Officejet Pro X576dw MFP D [24/Oct/2014:07:22:33 +0200] [Job 262] Running command line for pstops: pstops 262 schlomo hebrew-test.pdf 1 'Duplex=None finishings=3 media=iso_a4_210x297mm output-bin=face-down print-color-mode=color print-quality=4 sides=two-sided-long-edge job-uuid=urn:uuid:83e69459-c350-37e5-417d-9ca00f8c6bd9 job-originating-host-name=localhost time-at-creation=1414128153 time-at-processing=1414128153 PageSize=A4' D [24/Oct/2014:07:22:33 +0200] [Job 262] Using image rendering resolution 600 dpi D [24/Oct/2014:07:22:33 +0200] [Job 262] Running command line for gs: gs -q -dNOPAUSE -dBATCH -dSAFER -sDEVICE=ps2write -sOUTPUTFILE=%stdout -dLanguageLevel=3 -r600 -dCompressFonts=false -dNoT3CCITT -dNOINTERPOLATE -c 'save pop' -f /var/spool/cups/tmp/0666d544aec68 I think that the PPD is broken because it does not specify a resolution. It would be nice if the PPD could be fixed. To manage notifications about this bug go to: https://bugs.launchpad.net/hplip/+bug/1385055/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
