View Revisions: Issue #598
| Summary | 0000598: Add PDF to monochrome conversion before proxy printing | ||
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| Revision | 2015-10-02 15:17 by rijkr | ||
| Description | IST: Some printers print PDF as color even if the IPP job instructed monochrome output. SOLL: Add a proxy printer option to convert PDF to monochrome locally before sending it to the printer. |
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| Revision | 2015-11-17 19:50 by rijkr | ||
| Description | IST: Some printers print PDF as color even if the IPP job instructed monochrome output. SOLL: Add a proxy printer option to convert PDF to monochrome locally before sending it to the printer. Won't fix since there is no need for an extra grayscale conversion because the PPD must that takes care of that. This issue was raised when testing the release of Smartschool print jobs from a PaperCut virtual queue. It was observed that in the process of releasing print jobs, and thereby transferring held spool files to physical queues, original job options are lost and print queue defaults are used. So, when the printer queue defaults to "color" even monochrome content (as converted by SavaPage) was still internally counted as color. This is an issue of PaperCut and not of SavaPage and is solved by workaround 0000596 issue. |
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| Revision | 2016-05-23 15:53 by rijkr | ||
| Description | IST: Sometimes PDFs get printed as color even if the IPP job instructed monochrome output. SOLL: Add a proxy printer option to convert PDF to monochrome locally before sending it to the printer. This issue was raised when testing the release of Smartschool print jobs from a PaperCut virtual queue. It is observed that in the process of releasing print jobs to a papercut:ipp:// physical queue, and thereby transferring held spool files to physical queues, the original IPP job options are lost and the target print queue defaults are used. So, when the printer queue defaults to "color" the job is printed as color, even when the monochrome option was set by SavaPage. This is a "feature" of PaperCut and can solved by doing client-side grayscale conversion, and configuring physical target queues in CUPS with the Local Raw Printer driver and papercut://socket:x.x.x.x URI. As an alternative we could let PaperCut do the grayscale conversion (but this does not work, and is a pending issue reported to PaperCut as of 2016-05-11). Also see Smartschool issue 0000596 for a workaround by setting specific proxy printers for color/monochrome and simplex/duplex combinations. |
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