Fedora 43, RDM Flatpak 2025.3.0.9 - theme settings broken/non-functional

Published 4 months ago

Greetings,

As the title says, the RDM flatpak theming does not seem to work correctly. I run my system on dark mode, but if I select either "System" or "Dark" from preferences, and reboot the application, it is still in light mode.

The workaround I found is to use Flatseal to add "GTK_THEME=Adwaita-dark" as a variable. This overrides RDM's theming and forces dark mode. I have noticed that none of the other flatpaks I use exhibit this behavior. Most of them don't even have theming options, they just inherit the system setting.

All Comments (5)

Carl Marien

Published 3 months ago

Hello,

Thank you for reaching out to Devolutions Support.

I was able to reproduce the issue on my end. However, I believe the problem may be related to the Linux user interface rather than Remote Desktop Manager itself.

I’ll consult with our development team to get their input. In the meantime, could you please let me know which desktop environment you are using? I’m currently experiencing the issue on Plasma.

Best regards,

Carl Marien

aerowinder

Published 3 months ago

Greetings,

Thanks for the reply. Using Plasma here as well.

Simon Duguay Létourneau

Published 3 months ago

Hello,

One reason it may work out of the box for other Flatpak applications is that they are configured with broader filesystem access, whereas ours is more restricted by default.

If you only want to use the Adwaita-dark theme, you can install org.gtk.Gtk3theme.Adwaita-dark and it should work without changing the GTK_THEME variable.

For other themes, keep in mind that Flatpak runs applications in a sandboxed environment, so it doesn’t have access to some folders where GTK themes are stored. To allow access, you can run the following commands for a user installation:

flatpak override --user --filesystem=~/.themes com.devolutions.remotedesktopmanager
flatpak override --user --filesystem=~/.local/share/themes com.devolutions.remotedesktopmanager

For a system-wide installation, use:

sudo flatpak override --filesystem=~/.themes com.devolutions.remotedesktopmanager
sudo flatpak override --filesystem=~/.local/share/themes com.devolutions.remotedesktopmanager

Please make sure to revert any changes you previously applied with Flatseal before trying this.

Let me know if this resolves the issue.
Best regards,

Simon Duguay Létourneau

aerowinder

Published 3 months ago

Greetings,

The proposed override directories do not exist on my system, so I tried this (my flatpak is user-install):

flatpak override --user --filesystem=/usr/share/themes:ro com.devolutions.remotedesktopmanager

This also does not work.

Just installing the Adwaita-dark flatpak does not resolve the issue, the variable must be specified as previously indicated to acheive dark mode.

Simon Duguay Létourneau

Published 3 months ago

Hello,

The /usr/share/themes directory can’t be used with Flatpak. Try to install your themes in either ~/.themes or ~/.local/share/themes, and then apply the override.

Regards,

Simon Duguay Létourneau