[Bug] Window Transparency Not Working with Qt Apps on Hyprland

[Logicnosh]

Hey team,
I've been testing hyprland-qtutils on my Arch setup with Qt-based apps like VLC, Kdenlive, and Okular. Despite enabling transparency in hyprland.conf, the Qt windows remain fully opaque.

What I expected:
Qt windows should inherit Hyprland's global transparency rules, or at least respond to manual opacity adjustments via qtutils.

What happened instead:
No transparency is applied at all. Even setting opacity manually with hyprctl dispatch opacity has no effect on Qt windows.

Repro Steps:
Use Hyprland with hyprland-qtutils installed

Launch VLC or Okular

Apply transparency settings

Observe no visual change

System Info:
Distro: Arch Linux (Wayland session)

Hyprland: v0.30.0

hyprland-qtutils: latest from AUR

Qt Version: 6.7

GPU: AMD RX 580

Extra Notes:
I suspect it’s related to QtWayland flags or missing env vars, but I’ve already tried:

bash
Copy
Edit
export QT_QPA_PLATFORM=wayland
export QT_WAYLAND_DISABLE_WINDOWDECORATION=1
Still no change.

Let me know if I can test or debug anything further.

[vaxerski]

Hyprland: v0.30.0

0.30 is like 2 years old?

[Niko-Bellic-69]

I am on the 51.1 and using qt6ct and kvantum. transparency is working in dolphin but not on pcmanfm qt for some reason