Can you please navigate to /sys/firmware/acpi/tables and run:
grep MXMS *
(note the space before the *) Please let us know whether there is any output or not, and if there is please post the output here.
Can you please navigate to /sys/firmware/ acpi/tables and run:
grep MXMS *
(note the space before the *) Please let us know whether there is any output or not, and if there is please post the output here.