Comment 0 for bug 1874933

As reported here:
https://www.phoronix.com/forums/forum/linux-graphics-x-org-drivers/intel-linux/1174225-dell-xps-7390-intel-ice-lake-performance-hit-hard-by-a-linux-kernel-regression?view=stream

This primarily impacts "Ubuntu 20.04 LTS (Focal Fossa)." as it switched to 5.4 kernel.
The 5.4 kernel added support for "Processor thermal device", for Ice Lake, which will expose the power tables (vi PPCC).

This system default max RAPL long term power limit is 15W. But this power table is specifying as 9W. So thermald will limit power to 9W.

If dptfxtract is executed, then power limit will be higher than power up value, but most of the users will use out of the box setup. So this need a workaround.

This workaround will ignore any power limit less than the power up power limit.

This is addressed in thermald 2.1 with two commits:
https://github.com/intel/thermal_daemon/commit/f7db434293387c965e8d9141608f855893740e3a
https://github.com/intel/thermal_daemon/commit/c3461690eafb7304bf59a39fb02955a5154b3861

I know 20.04 LTS uses 1.9.1. I can assist in backport if required.