** Description changed: Only with a workaround I can install Ubuntu 32-bit on a UEFI machine: - First install Ubuntu 64-bit on a temporary partition. - Then install Ubuntu 32-bit with ubiquity -b - Start Ubuntu 64-bit and run update-grub. - Start Ubuntu 32-bit. To make Ubuntu 32-bit update-proof I can run: sudo apt install grub-efi-amd64 sudo mount /dev/sda1 /boot/efi sudo grub-install --efi-directory /boot/efi --force-extra-removable After I can delete the temporary Ubuntu 64-bit installation To make Ubuntu 32-bit again bootable with UEFI secure boot I can additionally run: sudo dpkg --add-architecture amd64 sudo apt-get update sudo dpkg --install Download/grub-efi-amd64-signed_1.66.2+2.02~beta2-36ubuntu3.2_amd64.deb sudo dpkg-reconfigure grub-efi-amd64-signed sudo grub-install sudo apt-get install shim sudo dpkg-reconfigure grub-efi-amd64-signed sudo dpkg-reconfigure shim sudo grub-install Please make this possible directly with the Ubuntu 32-bit ISO image ! Rationale: The recommended 64-bit Ubuntu and 64-bit applications need up to 30 % more RAM so the pain of swapping occurs more likely and on UEFI- - machines with few resources such as Netbooks 64-bit applications perform - up to 30 % slower than 32-bit applications. + machines with few resources such as Netbooks. There 64-bit applications + often perform up to 30 % slower than 32-bit applications, e.g.: Firefox. See also: bug 1650337, bug 1649167 Another WORKAROUND only using the 32-bit Live-image via "Try Ubuntu": ubiquity -b sudo mount /dev/sdaX /mnt # Ubuntu target partition sdaX sudo mount /dev/sda1 /mnt/boot/efi # EFI-partition sda1 for dir in /dev /dev/pts /proc /sys /run; do sudo mount --bind $dir /mnt/$dir; done sudo chroot /mnt /bin/bash dpkg --add-architecture amd64 apt-get update apt-get install grub-efi-amd64-signed Optional: shim-signed grub-install [--efi-directory /boot/efi] update-grub exit In case of dual boot with Windows,in EFI-setup the boot order must me changed. Surprisingly, there was a menu entry in NVRAM, even the configuration via efibootmgr is impossible, caused by missing efivarfs driver in the 32-bit kernel.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1648278 Title: Make Ubuntu 32-bit ISO image directly installable on UEFI machine To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2-signed/+bug/1648278/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
