Hi Noah, Am 09.10.20 um 17:52 schrieb Matteo Croce: > On Wed, Oct 7, 2020 at 7:10 PM Noah Meyerhans <noahm@debian.org> wrote: >> >> On Tue, Oct 06, 2020 at 02:58:22PM +0200, Matteo Croce wrote: >>> The official Debian Buster image breaks when upgrading to bullseye. >>> GRUB fails like: >>> >>> error: symbol 'grub_file_filters' not found. >>> Entering rescue mode... >>> grub rescue> I had that issue on images where grub was meant to use paravirtualized drives (/dev/vda) but used virtual scsi (/dev/sda) instead. (KVM on an old Cloudstack which didn't recognize the Debian version... > That's what I did, started another VM and attached the disk, then ran > grub-install in a chroot. > > No luck. I had success with rescue images which offer the option to "Repair GRUB installation". That generated a "generic UEFI" boot setup which allowed me to inspect and fix the underlying issue. Hope that helps Michael
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