Just had the same error in Ubuntu 14.04, but noticed that it only occured AFTER I had updated from kernel 3.19.0-30-generic #33 to 3.19.0-30-generic #34 and especially after loading any new module.
Kernel 3.19.0-30-generic #33 and 3.19.0-30-generic #34 has the same path so it makes sense that it's an incompability between loading 3.19.0-30-generic #34 modules into the already running 3.19.0-30-generic #33 kernel. A simple reboot and no errors. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1253155 Title: Failure to validate module signature at boot time To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1253155/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs