Some additional information: On my system, a similar message is visible for half a second every single time I boot. When I was stuck in the boot loop, I saw another line that said "Reset system".
I'm not 100% sure I'm experiencing the exact same issue, but the very same update also caused a permanent boot loop on my laptop. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1747889 Title: (Acer Aspire V3-372) System not booting after update To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/shim-signed/+bug/1747889/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs