Comment 4 for bug 2043483

Secure boot test on amd64:
After enrolling the key and installing this kernel
```
ubuntu@jammy-vm-2:~$ uname -a
Linux jammy-vm-2 6.5.0-14-generic #14~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Mon Nov 20 18:15:30 UTC 2 x86_64 x86_64 x86_64 GNU/Linux
u
```

 I checked the boot logs:
```
[ 0.000000] secureboot: Secure boot enabled
[ 0.000000] Kernel is locked down from EFI Secure Boot mode; see man kernel_lockdown.7
```
 And confirmed that integrity is selected
```
ubuntu@jammy-vm-2:~$ cat /sys/kernel/security/lockdown
none [integrity] confidentiality
```