How to disable the MIMO and 5GHz capabilities on the Intel 9260 WiFi module

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How to disable the MIMO and 5GHz capabilities on the Intel 9260 WiFi module

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For disabling 5 GHz I saw online (I no longer have the source webpage) that there was a modprobe option 5ghz_disable which when set to 1 would disable 5Ghz. Option appears to have been removed 6 years ago.

https://gitlab.flux.utah.edu/xcap/xcap-capability-linux/commit/4103d8485090cd4bf4d05b96fcf55409eec664ad

For disabling MIMO:

I tried setting ht_capab=[SMPS-STATIC] in hostapd.conf config file but was told it was an invalid option.

We are running in an ARM Linux environment

Kernel: 4.19.0-xilinx-00010-g0c94d3ade

Wifi Module: iwlwifi

Any guidance you can provide regarding the proper technique to disable 5GHz and MIMO would be appreciated.

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