I have this same problem when installing Xubuntu-20.10 using KVM/QEMU and virt-manager. The iso file boots properly and live system runs as expected but there is a cpmplete failure to install grub to /dev/sda. Looking at the filesystem in thunar shows that this appears to be a UEFI install with an EFI partition and also for some reason a small BIOS-boot partition, but attempting to install grub to either of those two partitions also fails leaving the installed system unbootable. A bug was created by the installer after this failure at https://bugs.launchpad.net/bugs/1899370
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1893964 Title: Installation of Ubuntu Groovy with manual partitioning without an EFI System Partition fails on 'grub-install /dev/sda' even on non-UEFI systems To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1893964/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
