
Qt applications (e.g, qBittorrent, KeePassXC) look weird as they don’t have window border or shadow in Ubuntu since 24.04. Here’s how to configure to make them look native.
Applications in Ubuntu and other popular Linux distributions mostly use GTK or Qt tool-kits for rendering their user interfaces. Gnome is based on GTK. It uses “xcb” QPA plugin for Qt apps running on classic Xorg session.
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