Created attachment 135072 [details] this shows a wayland screenshot(under) with a X11 screenshot(above) SUMMARY STEPS TO REPRODUCE 1. Start plasma on wayland 2. Titlebars are bigger than the same configuration on X11 3. - OBSERVED RESULT Considerably taller window titlebar when running on wayland EXPECTED RESULT, Given that both use the same font, fontsize, and titlebar size on systemsettings, they should have the same size. SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: 5.10.9 (available in About System) KDE Plasma Version: 5.20.90 KDE Frameworks Version: 5.78.0 Qt Version: 5.15.2 ADDITIONAL INFORMATION It seems something related to the font/size, as changing fonts alter this behaviour. I am using Fira Sans 11pt as window title. I am also using it under 94dpi, if it matters. This issue happens for quite some time now. I'm reporting it after seeing it still happens on the latest plasma beta (5.20.90)
Does this happen with other window decoration themes, or just Breeze? Also does it happen with Noto Sans 10 or Noto Sans 11?
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(In reply to Nate Graham from comment #1) > Does this happen with other window decoration themes, or just Breeze? > > Also does it happen with Noto Sans 10 or Noto Sans 11? I can confirm it happens on oxygen as well, so maybe this should be moved to kwin? Regarding the fonts, it does not happen with noto, the panel scales when changing from 11 to 12, on both wayland and x11. Fira does the same on X11, but the titlebar scales with size 11 on wayland only. This is more like defect than properly a bug, but it can look pretty odd when using (not so) non standard fonts. Since the titlebar size seems tied to glyph size, is it done differently on wayland?
Thanks for the info.
This may be intentional, but I'll let the KWin people confirm or deny that.
> 94dpi Decoration units are based on font metrics. On Wayland, we have 96dpi.
Ah right, yeah. In fact on Wayland we don't even let you change the font DPI; you have to adjust the font size or use the normal scaling system.