After following <a href="https://help.ubuntu.com/community/Boot- Repair">this guide</a> I was able to finally boot grub (apparently it only worked if grub was installed in partition /dev/sda5).
I still cannot boot Ubuntu, it reboots before showing any information, and because grub does not support USB keyboards I cannot even choose to start Windows. But I guess that this problem was 'solved'. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1080058 Title: Unable to install on Ubuntu with EFI and GPT, but GPT disk is not the boot disk To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1080058/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs