OK removed those from /etc/default/grub, ran update-grub, rebooted
[ 0.000000] Command line: BOOT_IMAGE=/vmlinuz-5.8.0-22-generic root=UUID=21f0ab04-8421-49d1-8ad3-39fea6ea8a74 ro rootflags=subvol=@ quiet splash vt.handoff=7
same problem
OK removed those from /etc/default/grub, ran update-grub, rebooted
[ 0.000000] Command line: BOOT_IMAGE= /vmlinuz- 5.8.0-22- generic root=UUID= 21f0ab04- 8421-49d1- 8ad3-39fea6ea8a 74 ro rootflags=subvol=@ quiet splash vt.handoff=7
same problem