1) What code was removed? 2) GTK+ 3.16 or newer requires that window manager explicitly advertises that it does support _GTK_FRAME_EXTENTS. If it does not do that then GTK+ thinks that CSD is not supported. This is why windows windows looks like they are running without compositing manager.
It is not GTK+ that does not recognize compoz as compositor - simply compiz does not say - hey I do support _GTK_FRAME_EXTENTS. It could be "fixed" by adding _GTK_FRAME_EXTENTS to _NET_SUPPORTED - see my branch. But problem is that compiz really does not support _GTK_FRAME_EXTENTS so adding it to _NET_SUPPORTED is wrong. If it would be enabled then using theme that has .window-frame { margin: ..; box-shadow: ...; } (Adwaita as example) then if you would tile csd window to left or right side of screen then it would not look tiled - there would empty space around window. Basically missing _GTK_FRAME_EXTENTS support is reason why: 1) Ambiance theme does not add .window-frame { margin: ...; } 1) GTK+ is patched with 0001-gtkwindow-set-transparent-background-color.patch and unity_rbga_tooltips.patch. If csd window is used without compositor and theme does not has fallback style .solid-csd then rounded corners will be black - color that is set by 0001-gtkwindow-set-transparent-background-color.patch. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1436553 Title: Transparent windows render black with Gtk3.16 and compiz To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1436553/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs