"Another another update! last and I will try one install with automatic partitioning just to the external memory stick for the last test, If that one also screws the mbr on my internal disc than there is a serious bug somewhere...."
I did and when using the automatic partition option "use entire disk" on a external usb disk, the mbr on the first internal harddisk still gets broken! This time I did "not" manual select where to install mbr/grub in the "advanced option", because the summary page says that only the following disks and partions are altered and it did not contain sda!!! Therefore the summary page cannot be trusted and therefore the option "use entire disk" is still misleading. I'll try to recover the mbr because right now grub installed itself to it instead of partition... I backed up 512 bytes to be sure! Maybe I'll do one more install again to check if the "entire disk" option with manually selecting the mbr/grub install in the "advanced options" will work. Should I make several new bug reports of the strange conditions I discovered, because not all is I think in the scope of this bugpost, but they all share "screwing the mbr on the first disk". But this can be done in several ways we know by now. -- told ubiquity to install grub to sda6, but it breaks grub on mbr https://bugs.launchpad.net/bugs/409575 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs