https://bugs.kde.org/show_bug.cgi?id=527045
Bug ID: 527045
Summary: Klipper freezes copying of a large LibreOffice Calc
range for ~1 minute on Wayland (requests image
representation)
Classification: Plasma
Product: plasmashell
Version First master
Reported In:
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Clipboard widget & pop-up
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Target Milestone: 1.0
SUMMARY
Copying a large cell range in LibreOffice Calc (3 columns x 113,000 rows) makes
Calc unresponsive for about a minute. Disabling the Clipboard widget (System
Tray settings -> Entries -> Clipboard -> Disabled) makes the copy instant, so
Klipper is what causes the delay.
STEPS TO REPRODUCE
1. Open a spreadsheet in LibreOffice Calc with a range of 3 columns x 113,000
rows.
2. Select the whole range and press Ctrl+C.
3. Observe that Calc hangs for roughly a minute.
OBSERVED RESULT
Calc is unresponsive for ~1 minute. After it finishes, `wl-paste --list-types`
shows that the clipboard is now owned by Klipper (it contains
application/x-kde-onlyReplaceEmpty) and offers application/x-qt-image plus a
long list of image/* formats (png, avif, bmp, jpeg, webp, tiff, ...). Reading
text/plain afterwards is instant (3 MB in 0.02 s), so the delay happens when
Klipper fetches the data from Calc, not when pasting.
EXPECTED RESULT
Copying should not block the source application. Klipper should not request an
image representation for huge text/table selections, or at least should do it
asynchronously / with a size limit.
ADDITIONAL INFORMATION
- Changing Klipper's options (ignoring images, etc.) did not help.
- Switching LibreOffice VCL backend (SAL_USE_VCLPLUGIN=gen) did not help, so it
does not depend on the LibreOffice toolkit plugin.
- Suggestion: add an option to skip image data / limit the maximum size of a
clipboard entry, or ignore the image formats offered by the source application
when text is available.
SOFTWARE VERSIONS
Operating System: Kubuntu (Ubuntu 26.04 "resolute")
KDE Plasma Version: <output of plasmashell --version>
Session: Wayland
LibreOffice: 26.2.5.2 (4:26.2.5.2-0ubuntu0.26.04.1)
--
You are receiving this mail because:
You are watching all bug changes.
