5G wifi problem for TX2


We purchased one Jetson TX2 developer kit last year and two TX2 core modules recently. Everything works fine except the 5G wifi. We cannot find any 5G signal on all TX2 even with antenna provided by developer kit but we can easily find same 5G wifi with our laptop.However 2.4G works mostly ok, occasionally unstable.

As far as I know, 5G is originally supported by TX2. I am wondering is there any way that we can enable or use 5G wifi?




Are you indicating TX2 wifi cannot scan those channels in 5G band?
Could you share what channel is your AP using?

Hi Wayne,

Here is the channels information I used on my laptop.

$ iwlist frequen
lo        no frequency information.

wlp1s0    32 channels in total; available frequencies :
          Channel 01 : 2.412 GHz
          Channel 02 : 2.417 GHz
          Channel 03 : 2.422 GHz
          Channel 04 : 2.427 GHz
          Channel 05 : 2.432 GHz
          Channel 06 : 2.437 GHz
          Channel 07 : 2.442 GHz
          Channel 08 : 2.447 GHz
          Channel 09 : 2.452 GHz
          Channel 10 : 2.457 GHz
          Channel 11 : 2.462 GHz
          Channel 36 : 5.18 GHz
          Channel 38 : 5.19 GHz
          Channel 40 : 5.2 GHz
          Channel 42 : 5.21 GHz
          Channel 44 : 5.22 GHz
          Channel 46 : 5.23 GHz
          Channel 48 : 5.24 GHz
          Channel 52 : 5.26 GHz
          Channel 54 : 5.27 GHz
          Channel 56 : 5.28 GHz
          Channel 58 : 5.29 GHz
          Channel 60 : 5.3 GHz
          Channel 62 : 5.31 GHz
          Channel 64 : 5.32 GHz
          Channel 100 : 5.5 GHz
          Channel 102 : 5.51 GHz
          Channel 104 : 5.52 GHz
          Channel 106 : 5.53 GHz
          Channel 108 : 5.54 GHz
          Channel 110 : 5.55 GHz
          Channel 112 : 5.56 GHz
          Current Frequency:5.765 GHz


$ iwconfig
lo        no wireless extensions.

wlp1s0    IEEE 802.11  ESSID:"BJ_5G"  
          Mode:Managed  Frequency:5.765 GHz  Access Point: 8C:3B:AD:22:04:06   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:on

However on TX2, it shows:

$ iwlist chan
usb0     no frequency information
lo       no frequency information
dummy0   no frequency information
wlan0    no frequency information
l4tbr0   no frequency information
usb1     no frequency information
tunl0    no frequency information
eth0     no frequency information
$ iwconfig
usb0     no wireless extensions
lo       no wireless extensions
dummy0   no wireless extensions
wlan0    no wireless extensions
l4tbr0   no wireless extensions
usb1     no wireless extensions
tunl0    no wireless extensions
eth0     no wireless extensions

Any thoughts?

What gives:

rfkill list

It says

$ 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


Sorry for late reply. But I just wanted to ask if your tegra is in station mode or in AP mode.

Hi Wayne,

Do you mean /sys/module/bcmdhd/parameters/op_mode?

I checked my TX2, this parameter shows 0. I don’t know which mode it is …


So your tegra is running in station mode (due to op_mode is 0) and scanning your AP, is it correct?

You shared a list of AP channel, what does that list mean? Is it from your AP? or something else?

It looks to me that your AP is running a channel that tegra does not support.

We “support” 5G channel bandwidth, but only support those on our wireless document. Have you checked it before?

Hi Wayne,

OK.If it is the problem of supported bandwidth in China, do you think this problem will arise when our TX2 try to connect 5G in Canada?


My apology in advance because I really don’t know what is your usecase.

I also don’t know why you got this conclusion that it is a supported band problem in China.

Tegra has passed the wifi certification in China, so it must have some 5G channels supported. The problem here looks like your AP is running a channel that tegra not supports.

Could you configure your AP into other channel?
If not, please share what is your usecase. What channel is your target?

I check with my router vendor Netgear and the following forum. I change the nation(or country) to the US and set 5G signal channel to 36. And then my Jetson TX2 can access to 5G.