Created attachment 156380 [details]
screenshot of tiny window icons
NOTE: If you are reporting a crash, please try to attach a backtrace with debug symbols.
STEPS TO REPRODUCE
1. Start Plasma 5.27 on X11
2. Set global scale to 200%
3. Use any GTK application like gtk4-demo
Tiny icons and scrollbars (see screenshot).
Icons and scrollbars are scaled properly. This is a regression from 5.26. It seems the scale is now communicated via the text scale, but not the window scale.
KDE Plasma Version: 5.27.0
KDE Frameworks Version: 5.103.0
Qt Version: 5.15.8
*** This bug has been marked as a duplicate of bug 465733 ***
Isn't the duplicate wayland-specific? This happens on a plain x11 session
I don't think this is bug 442901 since that was specific to wayland. What happens here is that GTK has two scales, the "window" scale, and the "font" scale.
Before, the global scale used to be floored, and given as window scale, and the rest was passed as font scale. Now it seems it's unconditionally passed as font scale, which seems broken because it affects text, but not the size of other widgets like scrollbars or window buttons.
This is fixed in Plasma 5.27.1