DYMO USB serial number issue

[mikestamat]

I have three Dymo Labelwriters connected to a Raspberry Pi 3. Because Dymo does not report the printer serial number in the Device ID, I compiled OpenPrinting CUPS from source using the instructions @michaelrsweet described in this known issue: (OpenPrinting/cups#170) ... and also discussed here: (https://ubuntuforums.org/showthread.php?t=2441092)

The install was successful and lpinfo reported the unique device URIs for each printer. However, when attempting to add a printer via the CUPS web interface, the page would error out and checking the logs reported:
W [09/Apr/2023:16:14:41 -0400] Printer drivers are deprecated and will stop working in a future version of CUPS. See https://github.com/OpenPrinting/cups/issues/103

It appears the fix action is migrating away from OpenPrinting CUPS to lprint, but unfortunately the previous issue has surfaced again.
pi@rpi3:~ $ sudo snap run lprint server -o server-name=rpi3 -o server-port=632 -o auth-service=cups DYMO LabelWriter 450 (USB) (usb://DYMO/LabelWriter%20450?serial=01010112345600;MFG:DYMO;CMD: ;MDL:LabelWriter 450;CLASS:PRINTER;DESCRIPTION:DYMO LabelWriter 450;SERN:01010112345600;) -> dymo_lw-450 DYMO LabelWriter 450 (USB) (usb://DYMO/LabelWriter%20450?serial=01010112345600;MFG:DYMO;CMD: ;MDL:LabelWriter 450;CLASS:PRINTER;DESCRIPTION:DYMO LabelWriter 450;SERN:01010112345600;) -> dymo_lw-450 E [2023-04-09T20:44:42.257Z] Printer 'DYMO LabelWriter 450' already exists. DYMO LabelWriter 450 Turbo (USB) (usb://DYMO/LabelWriter%20450%20Turbo?serial=17082908152669;MFG:DYMO;CMD: ;MDL:LabelWriter 450 Turbo;CLASS:PRINTER;DESCRIPTION:DYMO LabelWriter 450 Turbo;SERN:17082908152669;) -> dymo_lw-450-turbo E [2023-04-09T20:44:42.264Z] Unable to register 'LPrint._ipps-system._tcp': Local name collision E [2023-04-09T20:44:43.328Z] Unable to register 'LPrint._ipps-system._tcp': Local name collision

Requesting a fix for lprint to handle this known Dymo bug.

[michaelrsweet]

Changed the title and moved to PAPPL, which is responsible for USB device support. There is workaround code in PAPPL but it doesn't kick in if the printer reports a serial number in the 1284 device ID...

DYMO is hardly the only offender in this behavior, but it is frustrating...

[mikestamat]

Thanks for the quick reply! Standing by to test in v1.4

[michaelrsweet]

[master 92223bc] Use the USB device serial number instead of the 1284 serial number value (Issue #271)

[v1.3.x f1e45ef] Use the USB device serial number instead of the 1284 serial number value (Issue #271)

Need to test but this mirrors the CUPS USB backend.

[michaelrsweet]

OK, tests out on macOS and Linux.

[mikestamat]

Sorry for the n00b question, but how can I go about testing this? Since it appears you merged to master for this fix, I did git clone https://github.com/michaelrsweet/pappl and attempted to compile from source. I guess I need the cups developer package? Assuming I get pappl installed then do I need to compile lprint from source with configure referencing my pappl files?

I ask because I'm getting the following error on "make":

Compiling pwg-driver.c...
Linking testmainloop...
/usr/bin/ld: pwg-driver.o: in function pwg_rwriteline': /home/pi/pappl/testsuite/pwg-driver.c:772: undefined reference to cupsRasterWritePixels'
/usr/bin/ld: pwg-driver.o: in function pwg_rstartjob': /home/pi/pappl/testsuite/pwg-driver.c:616: undefined reference to cupsRasterOpenIO'
/usr/bin/ld: pwg-driver.o: in function pwg_rendjob': /home/pi/pappl/testsuite/pwg-driver.c:517: undefined reference to cupsRasterClose'
/usr/bin/ld: pwg-driver.o: in function pwg_rstartpage': /home/pi/pappl/testsuite/pwg-driver.c:641: undefined reference to cupsRasterWriteHeader2'
/usr/bin/ld: ../pappl/libpappl.a(job-process.o): in function papplJobCreatePrintOptions': /home/pi/pappl/pappl/job-process.c:416: undefined reference to cupsRasterInitPWGHeader'
/usr/bin/ld: ../pappl/libpappl.a(job-process.o): in function _papplJobProcessRaster': /home/pi/pappl/pappl/job-process.c:599: undefined reference to cupsRasterOpenIO'
/usr/bin/ld: /home/pi/pappl/pappl/job-process.c:607: undefined reference to cupsRasterReadHeader2' /usr/bin/ld: /home/pi/pappl/pappl/job-process.c:841: undefined reference to cupsRasterClose'
/usr/bin/ld: /home/pi/pappl/pappl/job-process.c:704: undefined reference to cupsRasterReadPixels' /usr/bin/ld: /home/pi/pappl/pappl/job-process.c:769: undefined reference to cupsRasterReadPixels'
/usr/bin/ld: /home/pi/pappl/pappl/job-process.c:819: undefined reference to `cupsRasterReadHeader2'
collect2: error: ld returned 1 exit status
make[1]: *** [Makefile:73: testmainloop] Error 1
make: *** [Makefile:28: all] Error 1