Also "Disable 40MHz support in the 2.4GHz band" solo or combined, e.g. # modprobe -rv iwlwifi # modprobe -v cfg80211 cfg80211_disable_40mhz_24ghz=1 # modprobe -v iwlwifi swcrypto=1 # cat /sys/module/cfg80211/parameters/cfg80211_disable_40mhz_24ghz Y # cat /sys/module/iwlwifi/parameters/swcrypto 1 poma