[coreboot - Bug #642] x201t Turbo boost not working, CPU running hot

Issue #642 has been updated by Patrick Rudolph.


Nehalem and older doesn't use the `intel_pstate` driver, but only `acpi-cpufreq`. Thus _CST generation is important for such older platforms.

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Bug #642: x201t Turbo boost not working, CPU running hot
https://ticket.coreboot.org/issues/642#change-2274

* Author: Janez Novak
* Status: New
* Priority: Normal
* Category: chipset configuration
* Target version: main
* Start date: 2026-05-03
* Affected versions: main
* Affected hardware: Lenovo X201 Tablet
* Affected OS: All
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Hello, i installed Coreboot on my x201t but turbo boost isn’t working and cpu won’t go past 2.1 GHz. My processor is an i7 640LM. Something i also noticed is that the system runs hotter with coreboot than with stock bios but i don’t know what’s causing that.

---Files--------------------------------
Kernel Logs.md (80.4 KB)
Coreboot Logs.md (152 KB)
Powertop Screenshot.png (34.5 KB)


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