[coreboot] X220t missing ACPI events

[Nicola Corna]

Hello everyone,

I have a X220t with coreboot and I've noticed that two ACPI events are missing from the original BIOS:

video/tabletmode TBLT 0000008A 00000000
video/tabletmode TBLT 0000008A 00000001

These two are the ACPI events generated when the screen is flipped into "tablet" or "laptop" positions.
They are very useful because, when in "tablet" position, the back of the screen touches the trackpoint and generates random movements; with these ACPI events I could instruct the acpi daemon to disable the trackpoint in the tablet configuration.

Unfortunately I have no experience of ACPI tables, but I can easily flash the original BIOS and provide any dump or log if needed.
Any help?

Thanks
Nicola Corna