Exactly the same thing happened on my other computer this morning. I noticed that I wasn't prompted to reboot the computer after a new kernel was installed, which I thought a bit odd. But when I started the Software center the button turned red. I think this is another bug so I'll start a new bug report.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/853045 Title: On/off button no longer goes red to indicate that a restart is necessary To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/853045/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs