Clementine not grabbing GTK Theme in Ubuntu 20.04 running Gnome 3.36.2

[BeholdenCypress]

Before posting

Please follow the steps below and check the boxes with [x] once you did the step.

• [x] I checked the issue tracker for similar issues
• [x] I checked the changelog if the issue is already resolved
• [x] I tried the latest Clementine build from here

System information

Please provide information about your system and the version of Clementine used.

• Operating System: Ubuntu 20.04 LTS
• Desktop Environment: Gnome 3.36.2
• Clementine version: Version 1.4.0rc1-231-g60a46d193

Expected behaviour / actual behaviour

• Expected Behavior: Clementine should be grabbing the theme (Arc-Dark) from the system.
• Actual Behavior: Clementine is using the default (ugly) white theme when Use the system default color set is selected under Perferences > Appearance.

https://i.imgur.com/HwRb7sK.png

[dmdmdm]

Hi. Clementine uses QT. I haven't tried this in your exact environment but it sounds like it might work: https://askubuntu.com/questions/910012/how-can-i-get-qt5-applications-to-use-the-gtk-theme-in-ubuntu-17-04

[funwhilelost]

@BeholdenCypress I was able to get a pretty close approximation on Ubuntu 20.04 by using Kvantum from this tutorial.

tl;dr

sudo apt install qt5-style-kvantum qt5-style-kvantum-themes
echo "export QT_STYLE_OVERRIDE=kvantum" >> ~/.profile

Log out, log in, run "Kvantum Manager" from activities, select "KvArcDark" and you should be good to go!

Example of KvGnomeDark on my machine: