In order to rule it out being the background, this was verified in inkscape by making a large circle with a gradient from one color to another. It shows very similar banding results.
** Visibility changed to: Public -- RadeonHD 3670, unable to show entire color scheme https://bugs.launchpad.net/bugs/243372 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
