Last night suddenly it failed to connect to the internet. I tried various process showed on youtube but nothing works. I reset my adapter, wifi router, my connection is all right but only Zorin 16 is failed to connect since last night. I don't understand what to do? Please help me for find a solution and connect with the internet again. thank you for your kind support.
i tried and unfortunately not solved the issue.
uname -r
sudo service network-manager restart does not work either.
Maybe, because you are running Proton.
Check This Out.
Can you please post the terminal output of:
sudo lshw -c network
in this thread?
Lets see... hope it will work... thank you for your support 
You might boot into your BIOS /EFI settings and check if IOMMU is enabled. If it is, disable it and then proceed to normal boot and test your net connection.
If it is working, please open a terminal and run
sudo apt update && sudo apt dist-upgrade
Thank you for all of your support 
it finally worked. Wish you have a great day guys... Cheers 
I notice that happen sometimes when u r running protonvpn and u shutdown ur pc without closing protonvpn.
what u will do is that:
editing /etc/resolv.conf file, by adding that line in it
nameserver (ip of ur dns)
that will return the conection to internet temporary , then u open protonvpn again, and everything will work good
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