Document that Tails requires I/O APIC being enabled in the VirtualBox VM config
The follow-ups to various bug reports about regressions against Tails 2.7 tell us that enabling I/O APIC in the guest’s motherboard settings fixes the regression many people have reported.
Side-note: I’ve also seen recommandations to switch the VM to 64-bit. I trust it helps (apparently it somehow enables I/O APIC) but that’s sub-optimal since Tails 2.x only support the guest utilities in 32-bit VMs (#11848 (closed)).
Feature Branch: doc/12001-virtualbox-needs-io-apic