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|Sun Server X2-8 Product Documentation Sun Server X2-8 (formerly Sun Fire X4800 M2) Documentation Library|
You can enable or disable the x2APIC architecture from the BIOS Setup Utility. Access the BIOS Setup Utility, select Advanced > CPU Configuration > x2APIC > Enabled or Disabled. Then Exit and save changes. See the following screen example.
Note the following conditions regarding the x2APIC option:
Oracle Enterprise Linux 5.6: Disable x2APIC for installation. After installation set back to enable x2APIC if UEK is going to be used.
Oracle Enterprise Linux 6: Enable x2APIC for installation and operation.
RHEL 5.6: Disable x2APIC for installation and operation.
RHEL 6: Enable x2APIC for installation and operation.
SLES 11 SP1: Enable x2APIC for installation and operation. And disable x2APIC if XEN is being used.