Failed to detect NetworkManager Service

[short bolt]

My printer decided today to stop showing the web interface and when i checked on the kipper screen, it shows that it failed to detect network service.
So now i can't view mainsail web interface nor i can SSH into my printer.
I'm not sure how i managed to break the network as i properly shutdown klipper before turning the printer off and I always update Ratos first if available.

Is there other way to fix this issue without reinstalling Ratos?

I'm running latest Ratos 2.1

Thank you

[agile fiber]

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[tacit citrus]

klipperscreen broke/changed some stuff, if you do a search in here you'll see lots of posts.

You should still be able to navigate to ratos.local from your computer or phone though

[short bolt]

I was able to initially access SSH through [e-mail] but then i reinstalled klipper screen and now even rato.local does not work 😅

[icy spear]

I have the exact same issue. If I unplug the screen and reboot the printer, the printer connects to my wifi. If I turn the printer on with the screen connected I get the same network manager issue and the printer doesn't connect. Network manager is installed and up to date aswell

[vernal brook]

Network manager doesn't work with Rat-OS wifi

@pearl sapphire didn't you pin the specific version of klipper screen that works?

[icy spear]

So do we know why it's asking for it and why it's installed on my ratrig from a default install of ratos

[vernal brook]

See the post by thetik above

[icy spear]

So are we saying in the newer versions of klipperscreen and we should revert back to an older version?

[pearl sapphire]

Newest should work. I have no idea how klipperscreen affects network connectivity when NetworkManager is not available, that would be a klipperscreen bug. FWIW i can't reproduce that on my machines, but i'm running 2.1.

[pearl sapphire]

Klipperscreen dropped support for everything but NetworkManager. We don't use NetworkManager, so the klipperscreen network panel doesn't work. That's intentional by the klipperscreen author (and i prefer it like this as it always killed the wpa-supplicant symlink before, imo you should not use it for networking, use the configurator). It should not kill your network connection though.

[icy spear]

So I'm completely up to date on ratos and all the other programmes. Still running 2.0.x version not 2.1

[icy spear]

I know you mentioned the configurator, but where would this be fixed in that? Little lost in this as I don't use it for networking. On first boot I logged into ratos and gave it my wifi, screen came later. When screen is connected it works fine, but stops the printer connecting to WiFi. If I unplug it, it connects to my wifi

[pearl sapphire]

That might be the issue. I believe klipperscreen force installed network manager at one point. If network manager exists, klipperscreen probably tries to start it, killing everything else in the process. You can try this:

ssh [e-mail]
sudo systemctl disable NetworkManager
sudo systemctl mask NetworkManager
sudo reboot now

[pearl sapphire]

I know you mentioned the configurator, but where would this be fixed in that?
Nothing about klipperscreen is fixed in the configurator, but the wifi configuration should be done through the configurator, just like instructed in the docs.

[icy spear]

Thinking about this, a while back I did have connection issues where I was able to see my router from the network tab on the screen and reconnected through that wonder if this caused it to use the screen for connection

[pearl sapphire]

Yep this is bad

sec

[icy spear]

OK, I understand this now. Will deleted network manager and rerun the wifi connection via ratos local. Cheers for your help

[pearl sapphire]

Klipperscreen would have broken that functionality if you used that to connect to a network

You can restore it like this:

ssh [e-mail]
sudo rm -f /etc/wpa_supplicant/wpa_supplicant.conf
sudo ln -s /boot/ratos-wpa-supplicant.txt /etc/wpa_supplicant/wpa_supplicant.conf

[icy spear]

One of these problems, where it being sometimes working doesn't help debug the problem.

[pearl sapphire]

indeed

[icy spear]

Should I only run this, or run this after uninstalling network manager

Uninstalling

[pearl sapphire]

first disable network manager:

ssh [e-mail]
sudo systemctl stop NetworkManager
sudo systemctl disable NetworkManager
sudo systemctl mask NetworkManager

then restore the symlink

ssh [e-mail]
sudo rm -f /etc/wpa_supplicant/wpa_supplicant.conf
sudo ln -s /boot/ratos-wpa-supplicant.txt /etc/wpa_supplicant/wpa_supplicant.conf

Then reboot (that's what sudo reboot now does). That should restore the ratos configurator wifi setup functionality and stop klipperscreen from busting the wifi connection.

[icy spear]

Awesome. Thanks for you help on this. Been driving me mad

[pearl sapphire]

You don't need the second ssh [e-mail] if you're already connected via ssh obviously, i just copy pasted the previous stuff 😄

[pearl sapphire]

Np, hopefully it works too.. 😅

[icy spear]

Haha. Yeah I understood that bit

[icy spear]

Ran the commands via shh, which has made it go to the ratos configurator, unfortunately it keeps on saying my credentials are invalid. Any clue why this maybe as its the correct password. I did see in the root directory on the sd card their is a wpa txt file I can manually add my credentials?

Thinking I might start from scratch with ratos 2.1 and see if this fixes everything

[short bolt]

My Pi started a wifi with Ratos and when I tried to join the network to configure my home network, it says incorrect password for "raspberry". I think i will just reinstalled Ratos again at this point and I hope this issue won't come back again from klipper screen.

[pearl sapphire]

did see in the root directory on the sd card their is a wpa txt file I can manually add my credentials?
That'll work yes, that's essentially what the configurator does.

unfortunately it keeps on saying my credentials are invalid
That means it can't save the password to the ratos-wpa-supplicant.txt file, most likely because the password isn't accepted by the wpa_passphrase command. Could be a special character thing for the SSID or Password, earlier versions of 2.0 didn't properly escape/quote the strings.

[pearl sapphire]

it says incorrect password for "raspberry"
Then you've somehow changed it, or you didn't enter it correctly?

https://github.com/Rat-OS/RatOS/blob/2d118e8fa4d4d9f1cf1bdd128bd9df60fdecbe8b/src/modules/hotspot/config

[icy spear]

That makes sense as my password for the WiFi does use special characters. I can access that file from the sd card, if I changed it in their and plug in my sd card would you think it would work? Don't particularly want to change my password as that's alot of updating other devices

[pearl sapphire]

Yep that should work

[short bolt]

Then likely it got changed when i reinstalled klipper screen which prompt me to install Network Manager at the end. I clicked Yes thinking it will fix the issue but apeparently not

[pearl sapphire]

Yeah that breaks everything

[icy spear]

Just to let you know, installed ratos 2.1 which had the same issue with special characters in my wifi password. Edited the wpa text file on the sd card and manually added my details under WPA and it works perfectly. Thanks for your help

[pearl sapphire]

hmmm... that's annoying. Did the password written to the wpa file by the configurator look correct?

Or did it not actually get that far?

[icy spear]

It wouldn't get that far as it said invalid credentials. I did try the normal way first then reverted to inputing them manually directly on the sd card. You need to take the sd card out and write it from your PC as that text file is locked while in the pi

[pearl sapphire]

You need to take the sd card out and write it from your PC as that text file is locked while in the pi
Just sudo nano /boot/ratos-wpa-supplicant.txt. It's not locked it's just not modifiable by anyone but root 🙂

[pearl sapphire]

Can you construct a password using the problematic characters (that is obviously very different from your actual password) so i have something to test with?

[icy spear]

Ahh OK. That's my lack of knowledge on Linux. Other than that ratos 2.1 works beautifully. I won my printer from the formnext giveaway you did so hadn't gone through the configurator before. It's very well thought out

[pearl sapphire]

Aah nice! congratulations on the win 🙂

Appreciate it

[icy spear]

So my password just has an @ in it. The rest is just normal upper and lower case letters

[pearl sapphire]

got it, thank you, will look into what's happening 👍

[icy spear]

Happy to help.

[worthy sigil]

Can you also please check the "!" character as well?

[pearl sapphire]

i reckon both require the same fix, but yes will include a test for that 👍

[tacit citrus]

TDD?

[pearl sapphire]

It's bash, and though there are bash testing libraries, it's really awful to use 😂

But i might be able to write them from typescript. I'm not big on TDD (i never get anything done), but i do regression tests and integration tests.

[tacit citrus]

Yeah, I'm trying it out in a personal project, wish we did more at work. Anyway, sorry to derail the thread 😄

[worthy sigil]

If I have to I can change password. It was assigned to me by ISP but I can change it if necessary. Means updating every device in house but no big deal.

[icy spear]

You can input the password manually via a txt file on the sd card

[worthy sigil]

Y'all are making this old man dig deep as RPi and Bullseye are my biggest weaknesses. I can do this. I will do this.

[pearl sapphire]

fortunately you don't need to know any of those, just put your pi's SD card in a card reader and edit the ratos-wpa-supplicant.txt file with a simple text editor (ie notepad or preferably vscode or notepad++, but not wordpad) on windows.

[worthy sigil]

Yeah I do use Notepad++. I assume I do this after first boot of RPi not before.

[pearl sapphire]

either works

[icy spear]

Haha, hope it works. I didn't fancy changing my wifi password, so this way is easier

[sharp belfry]

I tried this and initially it worked. but then when I did a full power off/on reboot, it didnt connect to the wifi again. Still have connection via eth0 though
Note: it only happens when I have the HDMI for my screen plugged in

[sharp belfry]

any thoughts here @pearl sapphire ?

[icy spear]

This is an ongoing issue with me aswell. If I unplug my screen it works fine. If I plug it in and reboot doesn't connect

[pearl sapphire]

@sharp belfry &@icy spear sorry for the late reply. That sounds alot like HDMI interference, see:

This is a known issue with the Raspberry Pi 4. The HDMI port can generate radio frequency (RF) interference that disrupts the 2.4GHz Wi-Fi band, especially at higher display resolutions. The issue is with the Pi's hardware design.

Here are several workarounds ordered from the most effective and simplest to the more involved:

1. Use 5GHz Wi-Fi: The interference primarily affects the 2.4GHz band. If the user's router and network support 5GHz, switching the Raspberry Pi to a 5GHz network is the most reliable solution.

2. Change 2.4GHz Wi-Fi Channel: The interference is strongest on the lower 2.4GHz channels (1-3). Configure the Wi-Fi router to use a higher channel, such as 7 or 11.

3. Improve Shielding:

   • High-Quality HDMI Cable: Use a short, well-shielded HDMI cable. Poorly shielded cables can radiate more interference.
   • Ferrite Beads: Clamping ferrite beads onto the HDMI and power cables can help suppress RF noise.

4. Use an external Wi-Fi Dongle: If the other solutions fail, using a USB Wi-Fi dongle (preferably on a short USB extension cable to move it away from the Pi) can bypass the onboard Wi-Fi module.

Note, we don't support #5, you'd have to configure the network manually.

[icy spear]

Thankyou. Will try these fixes and let you know if any of them solves the issue

[sharp belfry]

Omg this is crazy and I think that was the solution. I switched from the provided hdmi to another one I had and the problem went away!

[icy spear]

I think i need to do the same. Done both 1 and 2 and no luck. I am using a coiled hdmi cable to keep it neat underneath, but now thinking if it can coil its probably not shielded

[sharp belfry]

I specifically got this cable just fyi
https://a.aliexpress.com/_mOV2Gef

[half lynx]

I have the same issue - either WLAN or external monitor via HDMI
I tried NetworkManager but that didn't help. I try your list tomorrow.