Ubuntu 20.04 Software Centre background disappears under Yaru

[aedanyves]

As stated in the title, the background is not drawn and is transparent for the Ubuntu Software centre window. This issue occurs with all of the Yaru color schemes with the exception of "Yaru Dark" which I believe comes with stock Ubuntu 20.04. I have not noticed this problem with any other applications.

[Jannomag]

Sorry for the late reply. I've updated the whole theme with Yaru's 20.04 source. I didn't notice this issue on 20.04, yet, but I'll check it again.

[Jannomag]

I've found out the issue: It's happening when the themes are installed under /usr/share/themes. To fix this, install the themes to /home or set Yaru as snap theme manually using GTK+ inspector. Since it's snap related, it's not a bug of my theme directly. It's an open issue with snap, that you can't use own gtk themes.

Issue closed.

[Muqtxdir]

Hi @aedanyves,

Ubuntu-Software(Snap-store) is packaged as Snap-app in Ubuntu 20.04 LTS Snap-apps only support themes which are in gtk-common-themes snap.

Yaru-Colors is not for Snaps. Hence, the problem of Transparent background in Ubuntu-Software

The safe solution for this issue seems to involve reverting of theme to default Yaru-theme(only for Ubuntu-software) using GTK+inspector-tool

Solution:

• To enable Inspector -> gsettings set org.gtk.Settings.Debug enable-inspector-keybinding true (In terminal)
• Using GNOME-Tweaks change the Application theme to Yaru
• Open Ubuntu-Software app
• Press Ctrl+Shift+I and Navigate to Visual Tab
• Change GTK+Theme to Yaru theme and close it
• Using GNOME-Tweaks change the Application theme back to Yaru-blue
• Open Ubuntu-Software app and Now it is displayed in default Ubuntu-theme instead of being transparent

Note: This themeing-workaround can be applied to any GTK-based Snap apps.Sadly I don't know how to preserve this change after every reboot(I guess it should be done every time).

Hope this workaround improves your situation