com.canonical.desktop.interface scrollbar-mode corrupts gtk3 apps in non-Unity desktops

[Michael Webster]

This setting needs to be 'normal' for non-Unity desktops (i.e. Gnome-Shell, Cinnamon) or else background color corruption occurs in certain widgets (I suspect maybe the GtkScrolledWindow widgets?)

See pictures here:

https://github.com/linuxmint/Cinnamon/issues/2771

Nothing immediately jumps out at me in the quilt patches, but I will investigate further and see if I can troubleshoot this as well.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Michael Webster (miketwebster)]

I've discovered the package: overlay-scrollbar, and the file: os-scrollbar.c is implementing this.

http://bazaar.launchpad.net/~ubuntu-branches/ubuntu/trusty/overlay-scrollbar/trusty/view/head:/os/os-scrollbar.c

Would it be possible to check the session name (or look for Unity's dbus session name?) as a condition to apply this? I don't think blacklisting is maintainable here.

[Sebastien Bacher (seb128)]

the issue could be with the theme as well, the ubuntu themes have some rules to avoid those issues

[Rik Shaw (rik-shaw)]

In 14.04 I am using Ambiance theme with Cinnamon, and in Cinnamon Settings there was definite corruption (black backgrounds on the "tabs") that was solved by disabling overlay-scrollbars. Maybe there is something that Cinnamon Settings can be doing differently, but wanted to note that even with Ambiance theme there is this problem with certain apps. So, not "just a theme problem".

[Lars Karlitski (larsu)]

No, it is not "just a theme problem", but it can be fixed by setting backgrounds for various widgets in the theme. We did that for ubuntu-themes last cycle.

These theme fixes aren't necessary with gtk 3.12 (or without overlay-scrollbars).