I've been checking meanwhile to try to fix it and... I did! I solved the issue disabling the MSI Fast Boot feature in the BIOS configuration. It can be found in the following menu: Settings > Advanced > Windows 8/8.1 Configuration. It seems it was causing the problem. My motherload is MSI Z97S.
Do you still want me to run 'apport-collect 1761336'? Thank you for your time. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1761336 Title: Drops to grub> prompt in Secure Boot Mode To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/shim-signed/+bug/1761336/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs