I have an issue with KDE Connect since the last update. I am unable to pair my phone, since the PC doesn’t show up in the app. Tried unpairing and paring up again, but as you can guess, there is nothing to pair to from the phone.
PC doesn’t see the phone either.
Reinstalled the app in the phone. No change. I personally suspect that something’s wrong in the PC instance of KDE Connect, since it got updated.
How to troubleshoot and what kind of inxi output to post?
Edit: PC = laptop
I’ve just updated as well and KDE Connect is still connected to my phone.
Please ensure:
Your PC and phone are on the same WiFi antenna (no range extenders, 4G, …)
Is the kdeconnect process running:
ps -ef | grep kdeconnect
Example output:
user 3399 1 0 08:26 ? 00:00:02 /usr/lib/x86_64-linux-gnu/libexec/kdeconnectd
Is the process listening?
sudo netstat -tunelp | grep -i kdeconnect
Example output
tcp6 0 0 :::1716 :::* LISTEN 1000 36999 3399/kdeconnectd
udp6 39936 0 :::1716 :::* 1000 36998 3399/kdeconnectd
Maybe your firewall gets in the way?
Are the ports open/blocked?
netcat -z -v <your-phones-ip> 1714-1764 # Try phone and laptop, use port which netstat shows
Example output:
Connection to <your -phones-ip> 1716 port [tcp/*] succeeded!
(You also get lots of Connection refused, but you need 1 “succeeded”)
Check the kdeconnect home dir
ls -al /home/<user>/.config/kdeconnect/
Check the CLI interface
kdeconnect-cliI do not have the KDE Connect, but separate outputs of the
$ journalctl --boot 0 --priority err --no-hostname
and
$ journalctl --boot 0 --no-hostname | grep "kdeconnect"
could be helpful also.
Install it on both your phone and your PC: you’ll be amazed at what it can do!
I originally installed it for the “Ring my phone from my computer” feature, but I’m using all kinds of stuff nowadays.
Hi Fabby!
Ensured
Output:
ps -ef | grep kdeconnect
marko 1035 1 0 sept 15 ? 00:00:01 /usr/lib/kdeconnectd
marko 8311 2537 0 00:13 pts/1 00:00:00 grep kdeconnect
Seems to be fine though not matching yours.
Sudo tells me netstat: command not found
Turned off. KDE Connect came back on. Was able to pair. Turned the firewall on. Vanished.
How do I add an exception to the firewall for KDE Connect or what do I do? 
I use plasma-firewall as the GUI for firewall.
Best Regards,
Marko
First, learn what you will need to enter: open the firewall GUI of plasma-firewall.
add rule btn.If you want to support the app you use, please report that lack.
Press add rule btn. Learn what parameters needs to be entered to create a new rule.
$ pacman -Qi plasma-firewall
Name : plasma-firewall
Version : 5.22.5-1
Description : Control Panel for your system firewall
...
kinfocenter about-distro shows:
Operating System: Manjaro Linux
KDE Plasma Version: 5.22.5
KDE Frameworks Version: 5.86.0
Qt Version: 5.15.2
Kernel Version: 5.14.4-1-MANJARO (64-bit)
Graphics Platform: X11
Then, learn the KDE Connect app usage:
-) theoretically by it’s docs
or
-) load LiveCD session, and view output of
sudo lsof -ni
KDE Connect should be turned on and be listed there: just grab all you need: path, protocol, port, user, etc. from that output.
Load OS installation copy and add your new rule(s) according to specs you have just learned.
Therefore, I’ve marked this answer as the solution to your question as it is by far the best answer you’ll get.
However, if you disagree with my choice, please feel free to take any other answer as the solution to your question or even remove the solution altogether: You are in control! (If you disagree with my choice, just send me a personal message and explain why I shouldn’t have done this or 
or if you agree)
P.S. In the future, please don’t forget to come back to your question after your issue has been solved and click the 3 dots below the answer to mark a solution like this below the answer that helped you most:
so that the next person that has the exact same problem you just had will benefit from your post as well as your question will now be in the “solved” status.
I don’t even know which one you have: you installed it, you should read the manual! 
If you’re stiil interested in:
pamac install net-toolsI think by default it comes with ss instead of netstat:
sudo ss -atunp
Fabby, do you mean the post by alven?
EDIT
Oh. Now I get what’s going on…
Erm, no… mine???
Disabling the firewall solved it, right? How to open the right ports would be another (new) topic depending on your FW…
Yes I just realized
Sorry Fabby!!
Go away and don’t come back here until you’ve had at least:
Actually, looking at your time zone:
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