Bug 509686

Summary:	Okular interface hangs while waiting for network printer I/O
Product:	[Applications] okular	Reporter:	Massimiliano L <m.lincetto>
Component:	printing	Assignee:	Okular developers <okular-devel>
Status:	REPORTED ---
Severity:	normal
Priority:	NOR
Version First Reported In:	25.08.0
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Massimiliano L 2025-09-19 15:26:54 UTC

SUMMARY
When printing a document from Okular to a network printer, Okular hangs briefly while the system waits for the printer to respond. In particular, it hangs while the user waits for the "Print" dialog appear (few seconds), then it hangs for some more time (can be about 10 s) while the document is being sent to the printer. If the user tries to interact in this time frame, Plasma will mark the Okular window as unresponsive. In particular, is is not possible to close the Okular window immediately after clicking on "Print".

STEPS TO REPRODUCE
1. Open a PDF in Okular
2. Print it to a network printer

OBSERVED RESULT
Okular hangs while the system waits on the printer to respond / while the documents is being sent to the printer.

EXPECTED RESULT
Okular should be unaffected by the printer I/O.


SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 42
KDE Plasma Version: 6.4.4
KDE Frameworks Version: 6.17.0
Qt Version: 6.9.2
Kernel Version: 6.16.7-200.fc42.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 14 × Intel® Core™ Ultra 5 125U
Memory: 16 GiB of RAM (15.1 GiB usable)
Graphics Processor: Intel® Graphics
Manufacturer: LENOVO
Product Name: 21MMS7CK00
System Version: ThinkPad T14 Gen 5

ADDITIONAL INFORMATION
Printer is configured as ipp:// with IPP Everywhere Driver.