It seems the problem is caused by plymouthd that switches the active console from 6 to 0 when the boot splash is hidden:
[main.c] quit_splash:Not retaining splash, so deallocating VT [ply-terminal.c] ply_terminal_deactivate_vt:Attempting to set active vt back to 1 from 7 [ply-terminal.c] ply_terminal_deactivate_vt:couldn't deallocate vt 7: Device or resource busy ** Attachment added: "plymouth.log.buggy" https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1183212/+attachment/3687908/+files/plymouth.log.buggy ** Package changed: ubiquity (Ubuntu) => plymouth (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1183212 Title: The Ubuntu 13.04 installer outputs the message "Please remove installation media..." into a wrong console To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/plymouth/+bug/1183212/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs