On 13/09/2016 17:59, Slawa Olhovchenkov wrote: > Goggling on X2APIC_OPT_OUT take same result: other OS in this case > downgrade to xAPIC mode. It still does not make any sense for BIOS to turn on x2APIC and then instruct the OS that x2APIC must not be used. -- Andriy Gapon