Hello there!
I ran into what seems to be the same problem as well and I think I may have found a solution. Interestingly, the problem occurs only on one in six/seven (identical, at least in theory) devices. I stumbled upon https://salsa.debian.org/installer-team/grub-installer/-/commit/5eada0008eede06c97d55adca1a9eb1eb9447aee and noticed that the actual script which is called by debian-installer was not touched, so I came up with the following patch: diff --git a/grub-installer b/grub-installer index b824cab8..3380e6fc 100755 --- a/grub-installer +++ b/grub-installer @@ -64,6 +64,11 @@ if [ "$(udpkg --print-os)" = "linux" ] && [ ! -d "$ROOT/run/udev" ]; then mount --bind /run $ROOT/run fi +# Sometimes we need to manually mount efivarfs: https://bugs.debian.org/933523 +if [ "$(udpkg --print-os)" = "linux" ] && [ -z $(ls "$ROOT/sys/firmware/efi/efivars/") ]; then + mount -t efivarfs efivarfs $ROOT/sys/firmware/efi/efivars || error "Mounting efivars failed" +fi + get_serial_console() { # Get the last 'console=' entry (if none, the whole string is returned) local defconsole="$(sed -e 's/.*\(console=[^ ]*\).*/\1/' /proc/cmdline)" @@ -1429,6 +1434,10 @@ fi db_progress STEP 1 db_progress STOP +if [ "$(udpkg --print-os)" = "linux" ] && ! umount $ROOT/sys/firmware/efi/efivars; then + info "Failed to unmount /sys/firmware/efi/efivars in $ROOT" +fi + if [ "$(udpkg --print-os)" = "linux" ] && ! umount $ROOT/run; then info "Failed to unmount /run in $ROOT" fi I'll create a merge request as soon as my account on salsa.debian.org is approved. :-) Cheers! PizZaKatZe
