weird KDE printing Problem

[Michael Weghorn]

Hi Norbert,

since this does not really seem to be a question on development, I'd
suggest to have the further discussion on the "kde" mailing list (meant
for user questions, etc.) rather than "kde-devel".

About your problem:

> When printing from a KDE App, (tested with kwrite, kate, okular,gwenview), both printers are reported to have "US Letter" sized paper
> loaded and the output is scaled down to fit on a Letter-sized sheet.

KDE applications use the Qt print dialog. I'd usually also expect the
page size to be initialized with the default value for the printer
(marked with '*' in the lpoptions output).
This has been fixed for the Qt print dialog a few months ago [1] and is
going to be part of Qt 5.11, along with some other improvements to the
print dialog (s. also [2]).
Since your Qt version is older, that fix is probably not in there yet
(unless openSUSE has backported it).

I'm not sure what might have caused the switch from A4 to Letter in your
case (maybe any change in '/etc/papersize' or the locale?).

> Changing the papersize from Letter to A4 in the printer properties dialog is ignored and makes no difference.

It may be helpful to see what options are finally passed to CUPS. For
that, you can set 'LogLevel debug' in '/etc/cups/cupsd.conf', restart
the cups service (command: 'sudo systemctl restart cups.service'), print
again and have a look at the CUPS log (either /var/log/cups/error_log or
the journal, depending on what the 'ErrorLog' directive is set to in
'/etc/cups/cups-files.conf'.

The line that shows the options passed to CUPS is indicated by 'argv[5]'.


Regards,
  Michael

[1] https://codereview.qt-project.org/#/c/213677/
[2] https://www.kdab.com/better-support-for-cups-features-in-qt-5-11/



On 2018-05-03 12:53, Norbert Zawodsky wrote:
> Hello Mailinglist!
> 
> I wrote this topic already to another mailinglist and asked some of my
> freinds. But no one seems to have the faintest idea what could cause
> this problem or how to track it down. So maybe someone of you can help?
> 
> Distribution: openSuSE 42.3
> 
> I have 2 HP Color Laserjets attached to the LAN. (192.168.1.131 and
> 192.168.1.132)
> 
> Now "lpoptions -p CP3525 -l" reports:
> 
>   HPCollateSupported/Collation in Printer: True288 *False288
>   HPOption_500_Sheet_Feeder_Tray3/Tray 3: *True False
>   HPOption_Duplexer/Duplex Unit: *True False
>   HPOption_Disk/Printer Disk: True *False
>   HPOption_PaperPolicy/Paper Matching: *Prompt Scale Crop
>   HPServicesWeb/Services on the Web: *SupportAndTroubleshooting
> ProductManuals ColorPrintingAccessUsage OrderSupplies ShowMeHow
>   HPServicesUtility/Device Maintenance: *DeviceAndSuppliesStatus
>   Resolution/Printer Resolution: 600dpi *1200dpi
>   PageSize/Page Size: Letter Legal Executive HalfLetter w612h936 4x6 5x7
> 5x8 *A4 A5 A6 RA4 B5 B6 W283H425 w553h765 w522h737 w558h774
> DoublePostcard Postcard Env10 Env9 EnvMonarch EnvISOB5   EnvC5 EnvC6
> EnvDL Custom.WIDTHxHEIGHT
>   InputSlot/Paper Source: *Auto Tray1 Tray2 Tray3 Tray1_Man
>   Duplex/2-Sided Printing: None *DuplexNoTumble DuplexTumble
>   Collate/Collate: True *False
>   HPRotate180/Rotate Page 180 deg: *False True
>   MirrorPrint/Mirror Image: True *False
>   MediaType/Media Type: *Unspecified Plain HPColorLaserMatte105
> CardGlossy176220 ExtraHeavyGlossy131175 HPPremiumChoiceMatte120
> HPColorLaserBrochureMatte160 HPSuperiorLaserMatte160 HPCoverMatte200g
> HPMattePhoto200 HPPresentationSoftGloss120 HPProfessionalSoftGloss120
> HPPresentationGlossy130g HPProfessionalLaserGlossy130g
> HPColorLaserBrochureGlossy160 HPSuperiorLaserGlossy160
> HPCLaserPhotoGlossy220 Light6074 MidWeight96110 Heavy111130
> ExtraHeavy131175 Cardstock176220 MidWTGlossy96110 HeavyGlossy111130
> ColorLaserTransparency Labels Letterhead Envelope Preprinted Prepunched
> Colored Bond Recycled Rough HPToughPaper OpaqueFilm
>   HPCMYKInks/CMYK Inks: *DefaultCMYK_Plus SWOP Euro DIC CustomProfile
>   HPTextNeutralGrays/Text Neutral Grays: *Black ProcessBlack
>   HPTextHalftone/Text Halftone: Smooth *Detail
>   HPTextRGB/Text RGB Color: sRGB ImageOptimization Adobe *VividSRGB None
> CustomProfile
>   HPGraphicsNeutralGrays/Graphics Neutral Grays: *Black ProcessBlack
>   HPGraphicsHalftone/Graphics Halftone: Smooth *Detail
>   HPGraphicsRGB/Graphics RGB Color: *sRGB ImageOptimization Adobe
> VividSRGB None CustomProfile
>   HPPhotoNeutralGrays/Photo Neutral Grays: Black *ProcessBlack
>   HPPhotoHalftone/Photo Halftone: Smooth *Detail
>   HPPhotoRGB/Photo RGB Color: *sRGB ImageOptimization Adobe VividSRGB
> None CustomProfile
>   HPEdgeControl/Edge Control: Off Light *Normal Max
>   ColorModel/Print Color as Gray: Gray *CMYK
> 
> since "lpoptions -p M476 -l" reports basically the same, I omit it's
> output...
> 
> Both printers are loaded with A4 sized paper and the PageSize option
> above reports an "*" in front of A4
> Asking CUPS via it's web-interface it reports "Einstellungen:
> job-sheets=none, none media=iso_a4_210x297mm sides=two-sided-long-edge" 
> (same for the 2nd printer)
> 
> printing a CUPS test-page produces a correctly scaled output
> If I send, for example, a test pdf with lpr to the printer ("lpr -P
> CP3525 test.pdf") it produces a correctly scaled output.
> 
> So the printing subsystem looks like correctly working
> 
> But since the last OS upgrade from openSuse 42.2 to 42.3 I have a
> problem with printing from KDE Apps.
> 
> KWrite reports: Version 17.04.2, KDE Frameworks 5.32.0, Qt 5.6.2
> 
> When printing from a KDE App, (tested with kwrite, kate, okular,
> gwenview), both printers are reported to have "US Letter" sized paper
> loaded and the output is scaled down to fit on a Letter-sized sheet.
> Changing the papersize from Letter to A4 in the printer properties
> dialog is ignored and makes no difference.
> 
> Has someone of you an idea how I could hunt this problem? I have no idea
> where I could start searching..
> 
> Norbert
> 
>