I'll take a look.

Paraphrasing from #288

The Global Theme script attempts to put use the qt6-theme controll application as the global QT-Theme (which you do outside of KDE), and in the qt6 controll application, then sets kvantum (an theme-engine) as its theme. Still correct.

Then for kvantum, a non-existent kvantum theme (Breeze) is set, which is the issue. Breeze in itself is the default theme-ing of KDE, which is why it might be sane to assume that this might exist as a kvantum theme. But kvantum is not an official KDE thing, and uses different mechanisms to KDE/QT themeing, so Breeze does NOT support it.

To be precise, this line is at fault

https://github.com/ChrisTitusTech/linutil/blob/f46d3137b797c22cd917897544c3effde6eeb0cc/core/tabs/system-setup/global-theme.sh#L56C1-L56C13

The solution is to put something else than Breeze there. From the default themes that come with kvantum, i muse kvArc would be the best one.

In the end, its a question of Chris's Preference what theme should be set

/label 'bug'

will be fixed in #630