my ambiance theme is broken. when i change the radiance to ambiance theme, title bar does not turn black, but still white as Radiance title bar. how to fix it?
You can try following.
Install gnome-tweak-tool by typing in terminal
Now after it has been installed you can run it by typing
This should pop up window where on left side-panel there is option "Theme" Here you can set option "Window theme" to Ambiance and option "GTK+ theme" to Ambiance as well. This should fix your problem.
I had the same problem.
I noticed that it started to occur when I installed a KDE application from the software center, in my case it was Subtitle Composer.
When I uninstalled it, the problem was solved.
Open terminal Ctrl+Alt+T and run this command:
For Ambiance Theme :
For Radiance Theme :