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Old 12-02-2021, 02:27 PM   #1
pedantic
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no c-state tables in intel_idle driver for tiger lake cpus


Hello,

I have a laptop with an 11900-H cpu and I noticed the cores weren't achieving any c-state deeper than C3 while idle.

After some digging, it seems that there are no c-state tables for tigerlake processors in the intel_idle driver, https://github.com/torvalds/linux/bl...e/intel_idle.c .

According to the driver's documentation, https://www.kernel.org/doc/html/late...ntel_idle.html , in this situation it will use ACPI tables for which the deepest c-state is 3.

Does anyone have an idea if there is a plan to implement these for tigerlake cpus? Power consumed at idle for my laptop is higher on linux at 12 Watts, instead of 9 Watts on Windows, which is unfortunate.

Thanks!
 
Old 12-05-2021, 04:49 AM   #2
mrmazda
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Sounds like a question for Intel's driver writers: https://lists.freedesktop.org/mailma...info/intel-gfx
 
  


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