vt.handoff=7 ~broken on VM
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Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
grub2 (Ubuntu) |
Incomplete
|
Undecided
|
Unassigned |
Bug Description
In an install made with 21.10 beta, the default settings add
vt.handoff=7 to the primary kernel command line in /boot/grub/
The effect of this is that the virtual console is somewhat broken during
boot. Prompts for LUKS passphrases are hidden, and once the system is
done booting, getty prompts do not show until the user navigates to
another virtual console. (This isn't possible until the system is
booted, meaning it's not a mitigation for accessing LUKS prompt. For
that, a user can hit escape and be presented with a partially-
LUKS prompt.)
Attached is an example of a getty prompt not showing. This is after
hitting ESC to get a LUKS prompt so that disks could be unlocked, so
that doesn't help later boot.
The system in this case is a debootstrap-
ext4 MD-RAID1 /boot.
Additional detail in case it's useful:
Hypervisor is Debian Buster, virt-manager, libvirt/KVM, default Spice
display, default QXL video. Legacy install, so no efifb.