My TX2 can not see my 5Ghz wifi built with my HTC-U11 hot spot

My TX2 can not see my 5Ghz wifi created with my HTC-U11 hot spot.
I am sure that the hot spot created with my HTC-U11 is ok cause my laptop can access that hot spot.
Dose it (tx2) support 802.11ac 5Ghz ?
Could you show me how to make a diagnosis on TX2 ?
Thanks.

There are several ways to list the access points seen by Linux:

sudo nmcli dev wifi list
sudo iw dev wlan0 scan

Hi snarky,
Thank you for your instruction. My laptop is T460p and I run ubuntu 17.04 on it.

The below is the hotspot I gather with your commands on my laptop.
It is the one that my TX2 can not see. Could you tell me what problem with my TX2 ? I really have no idea.
Many thanks.

*  SSID               MODE   CHAN  RATE       SIGNAL  BARS  SECURITY 
   iwureka            Infra  149   54 Mbit/s  79      ▂▄▆_  WPA2   

BSS 40:4e:36:5c:b5:6d(on wlp3s0)
        last seen: 1341.369s [boottime]
        TSF: 184924114 usec (0d, 00:03:04)
        freq: 5765
        beacon interval: 100 TUs
        capability: ESS Privacy ShortPreamble SpectrumMgmt RadioMeasure (0x1131)
        signal: -62.00 dBm
        last seen: 208 ms ago
        Information elements from Probe Response frame:
        SSID: iwureka
        Supported rates: 6.0* 9.0 12.0* 18.0 24.0* 36.0 48.0 54.0
        DS Parameter set: channel 153
        Power constraint: 0 dB
        RSN:     * Version: 1
                 * Group cipher: CCMP
                 * Pairwise ciphers: CCMP
                 * Authentication suites: PSK
                 * Capabilities: 16-PTKSA-RC 1-GTKSA-RC MFP-capable (0x008c)
        HT capabilities:
                Capabilities: 0x1ee
                        HT20/HT40
                        SM Power Save disabled
                        RX HT20 SGI
                        RX HT40 SGI
                        TX STBC
                        RX STBC 1-stream
                        Max AMSDU length: 3839 bytes
                        No DSSS/CCK HT40
                Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
                Minimum RX AMPDU time spacing: 2 usec (0x04)
                HT RX MCS rate indexes supported: 0-15
                HT TX MCS rate indexes are undefined
        HT operation:
                 * primary channel: 153
                 * secondary channel offset: below
                 * STA channel width: any
                 * RIFS: 0
                 * HT protection: no
                 * non-GF present: 0
                 * OBSS non-GF present: 0
                 * dual beacon: 0
                 * dual CTS protection: 0
                 * STBC beacon: 0
                 * L-SIG TXOP Prot: 0
                 * PCO active: 0
                 * PCO phase: 0
        WMM:     * Parameter version 1
                 * BE: CW 15-1023, AIFSN 3
                 * BK: CW 15-1023, AIFSN 7
                 * VI: CW 7-15, AIFSN 2, TXOP 3008 usec
                 * VO: CW 3-7, AIFSN 2, TXOP 1504 usec
        VHT capabilities:
                VHT Capabilities (0x339179a2):
                        Max MPDU length: 11454
                        Supported Channel Width: neither 160 nor 80+80
                        short GI (80 MHz)
                        TX STBC
                        SU Beamformer
                        SU Beamformee
                        MU Beamformee
                        RX antenna pattern consistency
                        TX antenna pattern consistency
                VHT RX MCS set:
                        1 streams: MCS 0-9
                        2 streams: MCS 0-9
                        3 streams: not supported
                        4 streams: not supported
                        5 streams: not supported
                        6 streams: not supported
                        7 streams: not supported
                        8 streams: not supported
                VHT RX highest supported: 780 Mbps
                VHT TX MCS set:
                        1 streams: MCS 0-9
                        2 streams: MCS 0-9
                        3 streams: not supported
                        4 streams: not supported
                        5 streams: not supported
                        6 streams: not supported
                        7 streams: not supported
                        8 streams: not supported
                VHT TX highest supported: 780 Mbps
        VHT operation:
                 * channel width: 1 (80 MHz)
                 * center freq segment 1: 155
                 * center freq segment 2: 0
                 * VHT basic MCS set: 0xfffa
        Extended capabilities: Extended Channel Switching, 6

What does the scan function say when you scan on the Jetson?
Are the antenna connectors firmly attached to the small U.FL-style connectors on the module?
What does “sudo rfkill list” say?
I forget what setup looks like, but did you select a country code for the WiFi? What is your intended country code?

Although, you’re right, mine only see the 2.4 GHz WiFi in my place too. I hadn’t noticed before, because I use wired 99% of the time.

I think the issue is that it doesn’t support “high” frequencies, at least by default:

Frequencies:
			* 5180 MHz [36] (20.0 dBm)
			* 5200 MHz [40] (20.0 dBm)
			* 5220 MHz [44] (20.0 dBm)
			* 5240 MHz [48] (20.0 dBm)
			* 5260 MHz [52] (20.0 dBm) (no IR, radar detection)
			  DFS state: usable (for 3778 sec)
			  DFS CAC time: 60000 ms
			* 5280 MHz [56] (20.0 dBm) (no IR, radar detection)
			  DFS state: usable (for 3778 sec)
			  DFS CAC time: 60000 ms
			* 5300 MHz [60] (20.0 dBm) (no IR, radar detection)
			  DFS state: usable (for 3778 sec)
			  DFS CAC time: 60000 ms
			* 5320 MHz [64] (20.0 dBm) (no IR, radar detection)
			  DFS state: usable (for 3778 sec)
			  DFS CAC time: 60000 ms

(This is from “sudo iw list”)

A country code is mentioned in the file /lib/firmware/brcm/nvram.txt
By default it’s set as ccode=XZ
However, I don’t know of changing this works. The nvram may be baked into the firmware already.

As said by someone from NVIDIA:

[url=https://devtalk.nvidia.com/default/topic/992322/jetson-tx1/wifi-multi-region-support-in-tx1-som-module/post/5204132/#5204132]

[/url]

Oh. I am sorry that I did not express clearly.
My TX2 did scan 2.4Ghz wifi access points.
It just can not scan my hotspot which is created by my HTC-U11 with 5Ghz.
Well, I have no other 5Ghz access points to make a comparison.

Below are the result of command: iw reg get on TX2

root@tegra-ubuntu:~# iw reg get
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)

root@tegra-ubuntu:~# iw reg set TW
root@tegra-ubuntu:~# iw reg get
country TW: DFS-JP
	(2402 - 2472 @ 40), (N/A, 30), (N/A)
	(5270 - 5330 @ 40), (N/A, 17), (0 ms), DFS
	(5490 - 5590 @ 80), (N/A, 30), (0 ms), DFS
	(5650 - 5710 @ 40), (N/A, 30), (0 ms), DFS
	(5735 - 5835 @ 80), (N/A, 30), (N/A)

root@tegra-ubuntu:~# rfkill list
0: bluedroid_pm: Bluetooth
	Soft blocked: yes
	Hard blocked: no
1: phy0: Wireless LAN
	Soft blocked: no
	Hard blocked: no
2: brcmfmac-wifi: Wireless LAN
	Soft blocked: no
	Hard blocked: no
root@tegra-ubuntu:~#

Even I execute “iw reg set TW”, the TX2 still can not find my 5Ghz hot spot.

Yes; it’s likely the firmware simply refuses to operate on the frequency that your access point is set to use.
Try some other channels and see if they show up?

Well, the channel can not be set on the default configure page in my phone.
Forget it. I have the TX2 connects to ethernet.
Thank you anyway.