Transparency Effects in KDE Plasma, not supported by color scheme

Question

Using Kubuntu 17.04 with Plasma 5.9.4

I installed a few Themes like Maia and Breath, which usually can use Transparency Effects, for the Console Background, Application Dashboard and the Panel. The Desktop Effect for Translucency is already activated. And I tried to set the opacity, but it does not seem to work.

Always when I try to set the Theme in Konsole, I get the Message:

This color scheme uses a transparent background which does not appear to be supported on your desktop

Is there a package I need to install, for this? Or do I miss something else? For any Idea, I would be grateful.

Screenshot for Konsole, and the Dock below is also set to 100% Transparency for the Background.

Solution 1

I had same issue but I got it solved when I changed rendering backend to XRender for my Nvidia card.

System Settings ---> Display and Monitor ---> Compositor.

Solution 2

this can be solve by changing the option of compositor:

There were also several errors related to this same issue

Solution 3

I had the same issue recently with KDE Plasma. When I went to 'System Settings -> Display and Monitor -> Compositor'.. there it stated that opengl detection was off, due to opengl causing KWin to crash in the past.

I switch back from opengl 3.1 to opengl 2.0, and re-enabled it... it is working (at least for now).

I think it is similar to this issue: https://forum.manjaro.org/t/kwin-crash-after-changing-rendering-backend-to-open-gl-3-1/30827

Comments

[Anwar]

Do you have a screenshot?

[Severus15]

I added a Screenshot for Konsole. Cannot make some of the Application Dashboard, somehow.

[Rohan Bhatia]

Thank you! I changed my compositor from OpenGL 2.0 with OpenGL 3.1

[CLOVIS]

Thanks a lot, it's the second time this saves me. I guess sometimes the updates rolls back the changes.

[Davi S Evangelista]

In my case the compositor wasn't starting automatically, thank you for the pointers!