Add instructions to modify initrd in /etc/grub.d/10_linux linux_entry() instead of grub.cfg

[dsegan]

This should persist through kernel updates.

There could be a few more improvements (eg. check for acpi_override file being present, ensure this lives in a file not part of a package like /etc/grub.d/11_linux), but I imagine this is a better starting point.

Thanks for aggregating all the Thinkpad X1 gen6 tips in one place.

[bes-dev]

Thanks for request :+1:

[dsegan]

You are welcome :-)