Hi

On two different Dell PowerEdge server configurations (a R740 with two 2nd gen XSP 8226 and a XR11 with a single 3rd gen XPS 5317), both reinstalled from scratch with a vanilla Debian 11 (kernel 5.10) and a vanilla Ubuntu 20.04.5 (kernel 5.4), I was not able to get the intel-speed-select utility working to investigate how the CPU core frequencies are configured.

In both Debian 11 and Ubuntu 20.04.5, the intel-speed-select utility was not installed and I compiled ot from sources. When I run it I get in all cases:

$ sudo ./intel-speed-select --help
Intel(R) Speed Select Technology
Executing on CPU model:106[0x6a]
Intel speed select drivers are not loaded on this system.
Verify that kernel config includes CONFIG_INTEL_SPEED_SELECT_INTERFACE.
If the config is included then this is not a supported platform.

On Debian 11,

$ grep INTEL_SPEED_SELECT_INTERFACE /boot/config-$(uname -r)
# CONFIG_INTEL_SPEED_SELECT_INTERFACE is not set

On Ubuntu 20.04.5,

$ grep CONFIG_INTEL_SPEED_SELECT_INTERFACE /boot/config-5.4.0-132-generic                                                                                     
CONFIG_INTEL_SPEED_SELECT_INTERFACE=m

 Both servers are configured in the BIOS such that all fancy Intel CPU options are enabled.

 

So... how do I get the intel-speed-select utility working without having to recompile the whole kernel?

Has someone some experience with it?

 

Many thanks for any help.