I tested in a Toshiba laptop from 2013 with Intel i5 (generation 3), http://www.toshiba.se/laptops/satellite-pro/c850/satellite-pro-c850-19w/
and using the default location (New York and US English) - in UEFI mode (not secure boot) - 'Erase disk' (to check with an MSDOS partition table, if Calamares can create an EFI system partition etc). It 'says' that it will create a GPT, an ESP and a root partition ... Indeed it did that: --- lubuntu@lubuntu:~$ sudo parted /dev/sda p Model: ATA KINGSTON SUV400S (scsi) Disk /dev/sda: 120GB Sector size (logical/physical): 512B/4096B Partition Table: gpt Disk Flags: Number Start End Size File system Name Flags 1 2098kB 317MB 315MB fat32 boot, esp 2 317MB 120GB 120GB ext4 lubuntu@lubuntu:~$ --- But when the installer was at 78%, it did not get any further, and the error window appeared. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1781015 Title: Calamares fails in UEFI mode after external command in Lubuntu Cosmic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/calamares/+bug/1781015/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs