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I have xubuntu, I did the update with do-release-upgrade, and everything seemed fine, except that after the final reboot I found myself without a network connection, and among other things by clicking on the network manager icon I always get all the desktop freezed for about 1 minute or something less.

Actually the network system works, because by connecting the mobile phone in tethering to the USB port I have the internet working.

I have two network cards, I think that I added the second one because the MB one was not a gigabit one.

The situation after the upgrade, with the tethering connection on usb:


Code:
$ ifconfig
enp2s5: flags=4099  mtu 1500
        ether c4:6e:1f:04:a9:7f  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 3  bytes 206 (206.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

enp4s0: flags=4099  mtu 1500
        ether 38:2c:4a:bd:46:1a  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10
        loop  txqueuelen 1000  (Loopback locale)
        RX packets 67454  bytes 3519689 (3.5 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 67454  bytes 3519689 (3.5 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

usb0: flags=4163  mtu 1500
        inet 192.168.42.175  netmask 255.255.255.0  broadcast 192.168.42.255
        inet6 fe80::6cff:8453:cc40:7cfe  prefixlen 64  scopeid 0x20
        ether 76:a4:9aBig Grind:a5:6a  txqueuelen 1000  (Ethernet)
        RX packets 111077  bytes 111779738 (111.7 MB)
        RX errors 17  dropped 0  overruns 0  frame 17
        TX packets 83659  bytes 17485797 (17.4 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

virbr0: flags=4099  mtu 1500
        inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255
        ether 52:54:00:27:37:33  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
After that, I tried removing the virbr0 connection, but nothing changed

Using a usb-to-ethernet adapter I have access to the router too, and therefore to the internet, but I cannot get the nic's working.

What could I check/do/fix?
10-10-2020, 06:26 AM
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