Thanks for the alternative workaround. But I have some questions: - What you mean by "in grub"? I'm not familiar with the Ubuntu Mate Live CD, only with Ubuntu and Lubuntu, and there is no GRUB menu. Do you mean the welcome screen? - I'm wondering how this alternative will work on machines like mine where no CD drive is available. Does it also work with USB-key, especially if both ISOs are on the same key with MultiSystem?
** 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. There 64-bit applications + machines with few resources such as Netbooks. Their 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. + 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
