Am 02.10.20 um 11:12 schrieb Petr Pisar: > On Thu, Oct 01, 2020 at 11:07:28AM -0700, Samuel Sieb wrote: >> On 10/1/20 5:52 AM, Marius Schwarz wrote: >>>> Is it possible to boot from the stick and then perform a grub-install >>>> with an old grub? >>>> >>> This attempt failed too: >>> >>> # grub2-install /dev/sda >>> grub2-install: Fehler: /usr/lib/grub/x86_64-efi/modinfo.sh existiert >>> nicht. Bitte geben Sie --target oder --directory an. >>> >>> and that file seems not to be part of any package. There is only one for >>> "i386-pc". >> You can't (and must not!) use grub2-install on an EFI system. > Of course you have. How else would you get GRUB EFI executable onto the boot > partition and register it into boot environments? > > But the correct invocation for EFI systems is different. You just use > "grub2-install" without the disk device name. If you do not state the devicename, how does grub choose the correct drive? I don't want to overwrite the bootloader on the ssd.
by entering "grub2-install /dev/sdb" where sdb was the usb drive, grub2 removed the working boot config from .. you guessed it by now.. the ssd :( The repair try, done by the docs.fp.org....bootloading-with-grub2 guide, honestly said, it wants to install i386 on a clearly x64 system. FYI: Not working without manual corrections insmod lvm insmod xfs set root=(hd0,gpt3) configfile /grub2/grub.cfg linux /vmlinuz-5.8.10.... initrd /initramfs-5.8.10.... boot Q: Why is configfile read, but not used if anything important is in it i.e. the sysroot options passed to "linux" to find the decrypted luks partition? AFTER this: i managed to boot the system, by manually mounting the dm-0 device to /sysroot BUT: grub2-mkconfig -o /boot/grub2/grub.cfg grub2-install --boot-directory=/boot /dev/nvm0n1 did not succeed in recreating a working boot environment, in fact, nothing changed. Still not presenting a grub menu, where grub2-mkconfig said, it created the menu. (i hate lying tools) Q: What did anaconda different on the first installation of Fedora, to make it work? --> HELP needed <-- Lesson learned: once it's on a system, don't play with grub2-install. Marius
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