This bug appears only with "GNOME Classic" session. How to repeat:
1. Install Ubuntu 17.10 2. apt install gnome-shell-extensions 3. reboot 4. login choosing "GNOME Classic" session 5. open terminal 6. do "notify-send foobar" 7. unreadable notification box appears Thus, I was able to get rid of this problem by choosing "GNOME on Xorg" session. ** Package changed: gnome-shell (Ubuntu) => gnome-shell-extensions (Ubuntu) ** Summary changed: - Notification message colour unreadable after upgrade to artful + Notification message colour unreadable with "GNOME Classic" session -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1719106 Title: Notification message colour unreadable with "GNOME Classic" session To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell-extensions/+bug/1719106/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs