WIFI does not connect when no monitor is connected

Autonomous Machines Jetson & Embedded Systems Jetson Nano
1

Hi guys,

I have a Jetson nano with an EDIMAX EW-7612UAn V2. I got the USB dongle to work with this command.

echo "blacklist rtl8192cu" | sudo tee -a /etc/modprobe.d/blacklist.conf

Now I want to run the Jetson Nano without monitor via remote desktop from WIN 10. I have installed xrdp for this. This also works but only if a monitor is connected.

If I unplug the monitor (HDMI) and start the Jetson Nano it does not connect to WIFI. Even if I now plug in the monitor, i can see that the Jetson Nano is booted but it is not connected to the WIFI.

  1. what does the Jetson Nano do differently when no monitor is connected?
  2. how do I get the Jetson Nano to connect to WIFI without a monitor? (I only want to run the Jetson Nano temporarily without a monitor, so no headless mode).

Thanks in advance.

3

I don’t think monitor is the cause of this issue…

What do you mean Nano is not connecting to wifi? Do you mean it does not auto connect to your AP?

Is the interface up?

4

Yes, it does not auto connect to WIFI when no monitor is connected.

What do you mean with interface? If I connect the Monitor I see the desktop, but the WIFI ist not connected.

5

What do you mean with interface?

I mean if you can still see wlan0 in ifconfig and just want to clarify if this issue is just no auto connection.
or even the wlan0 is gone.

6

If you are asking for auto connection, then maybe this page can help you.

7

Beware that most Linux distributions purposely use the WiFi settings and logins on a per-user basis, and this is triggered by a GUI login. By default most of these distributions do not enable WiFi without the GUI login. You will probably be interested in this:
https://forums.developer.nvidia.com/t/jetson-nano-network-not-starting-until-after-login/164578/3

NOTE: The boot stage where the GUI is enabled is “graphical.target”, and the fully booted, but non-GUI stage is “multi-user.target”. You will see this referenced in some configuration articles.

8

It actually has nothing to do with the monitor. Sporadically, the problem occurs that the wifi interface wlan0 is not present when booting. I then have to unplug the WIFI dongle and plug it back in. Then it works again.
I use an Edimax EW-7612UAn V2. This needs the RTL8192SU driver, which is buggy. But also the setting on the blacklist brings no remedy.

9

Thanks for the tip. Unfortunately, it did not solve the problem.

10

Hi,

If even wlan0 is not up, check lsmod and see if driver is up or not. If even driver is not loaded, then modprobe it and see if it can bring wlan0.

11

Thanks WayenWWW for your efforts, but I’m not going to waste any more time trying to get a wifi stick to work. We are in the 21st century and there is no time to deal with such banalities. In my opinion, wifi sticks that don’t work plug-and-play are junk. I bought this AC8265 wireless card from waveshares. Runs plug and play and costs $16.99 with cable and antennas. But anyway, thanks again for your effort. It could have been that it is done in an hour.

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