The described behavior with CPU thermal throtteling was confirmed by Lenovo. The limits are higher as in Windows "DPTF" works by driver support and enables the "desk mode". In Linux the "desk mode" is never reached due to the lack of sensor information and the system operates in the "lap mode" which has much lower trip temp.
See forum threat there: https://forums.lenovo.com/t5/Other-Linux-Discussions/X1C6-T480s-low- cTDP-and-trip-temperature-in-Linux/td-p/4028489 The patches are not published yet for all platforms. But as T480s, many other models e.g. X1C6 are affected too. Background info by Lenovo: https://forums.lenovo.com/lnv/attachments/lnv/Special_Interest_Linux/13642/1/Linux%20Thermal%20throttling.pdf Technical description by German magazine in German language only: https://www.notebookcheck.com/Lenovo-ThinkPads-haben-mit-CPU-Throttling- unter-Linux-zu-kaempfen-Loesung-in- Arbeit.435573.0.html?fbclid=IwAR0koYya67WfT8SlZmDuNx6F51niWYHzvd4C1MMzZdiyCJLutmC_4p3BJVs -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1763144 Title: Significantly lower power and thermal limits on ThinkPad T480s (and probably others) than on Windows To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1763144/+subscriptions -- ubuntu-bugs mailing list email@example.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs