Acpi Nsc6001 |verified|

But firmware can be wrong.

This is the native environment for this hardware. You need the specific chipset drivers. acpi nsc6001

If the problem started after a driver update, roll back: But firmware can be wrong

It has an NSC6001 for a serial controller. acpi nsc6001

: The "NSC" prefix in the ID stands for National Semiconductor , a major American semiconductor company (now part of Texas Instruments).