What does the kernel message "kernel: ACPI: PCI: Interrupt link LNKx disabled" mean?

Solution Unverified - Updated -

Issue

  • During system boot, the kernel shows a message similar to the following:

RHEL7:

kernel: ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 9 10 11 14 15) *0, disabled.

RHEL8/RHEL9:

kernel: ACPI: PCI: Interrupt link LNKA configured for IRQ 11
[...]
kernel: ACPI: PCI: Interrupt link LNKA disabled

Environment

  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

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