Public bug reported:
## System
* Kubuntu 26.04 LTS
* HP LaserJet Pro MFP 4102dw
* Network printer (192.168.1.165)
## Installed packages
* cups 2.4.16-1ubuntu1.3
* cups-filters 2.0.1
* ghostscript 10.06.0
* hplip 3.24.4
## Additional information
A Snap version of CUPS is also installed:
* cups 2.4.19-2 (snap)
## Observed behaviour
Printing through:
* Okular
* CUPS
* HPLIP backend
* IPP Everywhere queues
is extremely slow and sometimes appears to hang.
The printer itself is operational.
Direct PDF printing to JetDirect port 9100 is immediate:
cat file.pdf | nc 192.168.1.165 9100
The exact same PDF prints instantly using this method.
## Relevant log messages
HPLIP backend timeout:
io/hpmud/jd.c 632: timeout write_channel
hp:/net/HP_LaserJet_Pro_MFP_4102?ip=192.168.1.165
CUPS crash:
cups.service: Main process exited, code=dumped, status=11/SEGV
Process cupsd dumped core.
## Additional observations
The printer advertises native support for:
* PDF
* PostScript
* Duplex printing
via IPP attributes.
The printer is reachable and accepts jobs correctly.
## Expected behaviour
PDF jobs should print immediately through CUPS without excessive
processing delays.
cupsd should not crash.
## Actual behaviour
* Long delays before printing.
* HPLIP backend timeouts.
* cupsd segmentation fault.
* Direct raw JetDirect printing works correctly and immediately.
## Steps to reproduce
1. Configure HP LaserJet Pro MFP 4102dw as network printer.
2. Print a PDF from Okular or using lp.
3. Observe long delays or hangs.
4. Observe HPLIP timeout messages.
5. In some cases cupsd crashes with SIGSEGV.
## Workaround
Printing directly to port 9100 using:
cat file.pdf | nc 192.168.1.165 9100
prints immediately.
** Affects: cups (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "Errors from cups service (core dump)"
https://bugs.launchpad.net/bugs/2157961/+attachment/5978558/+files/errors-from-cups.txt
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https://bugs.launchpad.net/bugs/2157961
Title:
HP LaserJet Pro MFP 4102dw - Extremely slow printing through
CUPS/HPLIP and cupsd crashes with SIGSEGV, while direct JetDirect PDF
printing is immediate
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