install/55589: Dell R630 - X2APIC in Bios caused freeze

[david%mookie.me.uk@localhost]

>Number:         55589
>Category:       install
>Synopsis:       Dell R630 - X2APIC in Bios caused freeze
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    install-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Aug 19 19:00:00 +0000 2020
>Originator:     David Fox
>Release:        NetBSD 9
>Organization:
VirtualElementz Limited
>Environment:
N/A
>Description:
With X2APIC enabeld within BIOS, the installer hangs and is unable to boot to any operating system relating to *BSD

No error, the system instantly restarts.

Solaris reports something a long the lines of: 
No SOF interrupts have been received this usb ehci hostcontroller is unusable
>How-To-Repeat:
Restart, boot from ISO.
>Fix:
Turn on X2APIC within BIOS but you loose HT ability.