kernel: ACPI: \_SB_.IIO0.BR2A: [Firmware Warn]: Cisco Systems, Inc.: _DSM mask returns 0x80 but should return 0x81. Please contact Cisco Systems, Inc. for a BIOS upgrade.

Solution Verified - Updated -

Issue

  • The following message is logged on the system boot after upgrading to RHEL7.3 (kernel-3.10.0-514.el7):
kernel:   ACPI: \_SB_.IIO0.BR2A: [Firmware Warn]: Cisco Systems, Inc.: _DSM mask returns 0x80 but should return 0x81.  Please contact Cisco Systems, Inc. for a BIOS upgrade.

Environment

  • Red Hat Enterprise Linux 7.3 (kernel-3.10.0-514.el7)

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