I found another solution: I have to use for ubuntu not just a single partition but a whole disk! Otherwise it will not install grub correctly.
-- Ubuntu does not boot after installation https://bugs.launchpad.net/bugs/104611 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
