As part of an effort to troubleshoot Wi-Fi issue on an Intel Next Unit Computing(NUC) running Ubuntu 16.04, I updated my etc/default/crda, adding REGDOMAIN=US to the end of the file and reboot it.
However, sudo iw reg get still returns 00 (not set):
country 00: DFS-UNSET (2402 - 2472 @ 40), (N/A, 20), (N/A) (2457 - 2482 @ 40), (N/A, 20), (N/A), NO-IR (2474 - 2494 @ 20), (N/A, 20), (N/A), NO-OFDM, NO-IR (5170 - 5250 @ 80), (N/A, 20), (N/A), NO-IR (5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, NO-IR (5490 - 5730 @ 160), (N/A, 20), (0 ms), DFS, NO-IR (5735 - 5835 @ 80), (N/A, 20), (N/A), NO-IR (57240 - 63720 @ 2160), (N/A, 0), (N/A) Does anyone know why this would not be changing my REGDOMAIN?
21 Answer
Often, a country code is set in the chip of the wireless device. For example, I recently bought a USB wireless and, as I studied dmesg, I noticed:
cfg80211: Regulatory domain changed to country: CN
I am located in the USA.
Can you set the CRDA after the computer is started?
sudo iw reg set US iw reg get If so, you can set it in rc.local:
gksudo gedit /etc/rc.local Use nano or kate or leafpad if you don't have the text editor gedit.
Add a last line, right above exit 0, to read:
iw reg set US Proofread carefully, save and close the text editor.
If this is ineffective, please try:
sudo -i echo "options cfg80211 ieee80211_regdom=US" > /etc/modprobe.d/cfg80211.conf exit Check after a reboot:
iw reg get 
