"I have performed manual partition of disk." --> ok. So it's definitely not Bug #1050940 .
"The only I want is to load Ubuntu on GPT partition in legacy mode." --> for this, you need a BIOS-Boot partition. If you haven't, grub-install will return the error you observed in your bug description. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/998097 Title: Grub2 not recognise GPT when presence hybrid MBR To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/998097/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs