problem with internet connection SOLVED

[handyman4848]

Could not find a solution so I deleted both versions of mint and updated to Linux Mint 20.1


I am having a rather strange problem. I have a desktop computer set up to dual boot Linux Mint 18.3 and Linux Mint 19.3. I have not booted up mint 18.3 for several months and thought it might be a good idea to update it, but I could not access the internet.
It was working fine the last time I booted it up. The computer is hardwire connected to the router and linux mint 19.3 works fine, accesses the internet normally as do other computers on the network that are connected via wifi. I have gone over all my settings and can find nothing wrong.
I have included a printout of the ifconfig file for both mint 18.3 and mint 19.3 in case someone can find something I have missed:

Mint 18.3
bill@bill-desktop ~ $ ifconfig
enp3s0 Link encap:Ethernet HWaddr 9480:72:17:95
inet addr:192.168.2.102 Bcast:192.168.2.255 Mask:255.255.255.0
inet6 addr: fe80:489d:6c13:61e4/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1554 errors:0 dropped:0 overruns:0 frame:0
TX packets:1580 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:815604 (815.6 KB) TX bytes:186867 (186.8 KB)

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:13363 errors:0 dropped:0 overruns:0 frame:0
TX packets:13363 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1291293 (1.2 MB) TX bytes:1291293 (1.2 MB)

bill@bill-desktop ~ $


Mint 19.3
bill@bill-desktop:~$ ifconfig
enp3s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.2.102 netmask 255.255.255.0 broadcast 192.168.2.255
inet6 fe80::88e6fbb:6c85 prefixlen 64 scopeid 0x20<link>
ether 9480:72:17:95 txqueuelen 1000 (Ethernet)
RX packets 823530 bytes 1205336491 (1.2 GB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 416423 bytes 42536729 (42.5 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 4830 bytes 1028237 (1.0 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 4830 bytes 1028237 (1.0 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

tun0: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST> mtu 1500
inet 10.15.18.8 netmask 255.255.255.0 destination 10.15.18.8
inet6 fe80::8e6f:66fe:f2d9:6d4c prefixlen 64 scopeid 0x20<link>
unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 txqueuelen 100 (UNSPEC)
RX packets 782741 bytes 1095168722 (1.0 GB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 395894 bytes 15924386 (15.9 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

bill@bill-desktop:~$

I have compared the network configuration for both systems and they are the same.

Anyone have any ideas what could be wrong?

[sleeper12]

What does this show on 18.3:

Code: Select all

 iwconfig 

[handyman4848]

here is the output of iwconfig

bill@bill-desktop ~ $ iwconfig
lo no wireless extensions.

enp3s0 no wireless extensions.

Not surprising as the computer does not have wireless hardware installed.

One other curious thing is that when I type 192.168.100.1 into the browser in the mint 18 version (which will not connect to the internet) I get my modem setup menu, when I do the same thing in the mint 19 version (which does connect to the internet normally) it just hangs and does nothing.