The issue is, that you have not set up the gtk3 theme in xubuntu. It should better be done by xubuntu desktop, I think. So it's anyway a kind of bug.
See please the blog on http://binbashblog.blogspot.de/2011/10/manually-change-gtk3-theme-in-xubuntu.html The following has helped: cp -r /usr/share/themes/greybird/gtk-3.0 ~/.config For root account you need: sudo cp -r /usr/share/themes/greybird/gtk-3.0 /root/.config There were the problem with black areas with other gtk3 application as well, e.g. evince. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/989581 Title: Black areas in gnome-system-monitor graphs when running under xfce To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-system-monitor/+bug/989581/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
