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24.2.1-4 breaks scaling on Plasma 6 with Fractional Scaling

Description:

The update from 24.2.1-3 to 24.2.1-4 breaks scaling in Libreoffice on Plasma 6 with fractional scaling (e.g. 115% in my example). The toolbar is far too large (especially compared to the titlebar).

Scaling with integer scales (100%, 200%) works fine.

24.2.1-3

24.2.1-3

24.2.1-4

24.2.1-4

Additional info:

  • package version(s): 24.2.1-4
  • config and/or log files: no config
  • link to upstream bug report, if any:

Steps to reproduce:

  1. Start Plasma 6 with only a single monitor.
  2. Set Display Scale to something fractional, e.g. 115%
  3. Start Libreoffice
  4. Observe far too large toolbar

Suggested fix

The issue seems to be the qt6 / kf6 VCL plugin. Reverting back to 24.2.1-3, where kf5 was still enabled or exporting SAL_USE_VCLPLUGIN=qt5 is a temporary workaround.

I'd suggest to undo what 24.2.1-4 did and stay with kf5 for the time being until the qt6 / kf6 VCL plugins are fixed. Another solution would be to build both kf5 and kf6 for the Arch package so users can choose with an environment variable.

Edited by Ferdinand Bachmann
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