Pop!_OS (Linux)

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Pop!_OS is an operating system developed by System76 for STEM and creative professionals who use their computer as a tool to discover and create. Unleash your potential on secure, reliable open source software. Based on your exceptional curiosity, we sense you have a lot of it.

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Support us by buying System76 hardware for you or your company! Or by donating on the Pop!_OS website through the "Support Pop" button. Pop!_OS and COSMIC are fully funded by System76 hardware sales. All systems are assembled in the USA. With your support, we'll work to push the Linux desktop forward with COSMIC.

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Using the dark theme with Cosmic with flatpaks? (feddit.nl)

submitted 2 months ago by [email protected] to c/pop_os

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I want to use the dark cosmic theme with kweather from flatpak. I've tried lots of stuff, but I don't understand how to determine what is a valid theme from terminal, or how to add to use it with a flatpak.

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[–] [email protected] 1 points 2 months ago* (last edited 2 months ago)

I forgot to say, it's also possible to use Kvantum with KDE applications that are flatpaks.

I just had to set the theme to Kvantum in the KDE Settings. I also noticed that the theme works slightly better if the platform theme on KDE applications is exported as QT_QPA_PLATFORMTHEME=kde, though it's not necessary. One other note, QT works by using plugins. I think the export is specifying the installed plugin. That was confusing to me, I was searching for config files but it's a plugin to QT.

edit: When opening the KDE settings, I think I also had to change the export to QT_QPA_PLATFORM=kde temporarily so that KDE recognized that it was supposed to change configuration files on the filesystem. Otherwise, I think it expects that qt6ct is managing it, and it shouldn't do anything. (because qt6ct was likely set earlier in in either the /etc/environment or in the ~/.profile)

I don't remember it was a requirement or not. Just that I had to change it so that KDE Settings would use the theme when I opened it.