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cmorris's questions

Martin Hope
cmorris
Asked: 2024-10-16 23:42:33 +0800 CST
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After a seemingly innocuous update my Ubuntu 22.04.5 LTS system no longer auto-configures ipv4 networking on ethernet or wifi interfaces. Ipv6 works fine and manually configuring ipv4 works fine.

Here is the apt history from the offending update:

libpskc0:amd64 (2.6.7-3build1, 2.6.7-3ubuntu0.1),
cups-filters:amd64 (1.28.15-0ubuntu1.3, 1.28.15-0ubuntu1.4), 
ovmf:amd64 (2022.02-3ubuntu0.22.04.2, 2022.02-3ubuntu0.22.04.3),
google-chrome-stable:amd64 (129.0.6668.70-1, 129.0.6668.100-1),
ubuntu-advantage-desktop-daemon:amd64 (1.10~22.04.1, 1.10.ubuntu0.22.04.2),
libfontembed1:amd64 (1.28.15-0ubuntu1.3, 1.28.15-0ubuntu1.4),
cups-filters-core-drivers:amd64 (1.28.15-0ubuntu1.3, 1.28.15-0ubuntu1.4),
nodejs:amd64 (20.17.0-1nodesource1, 20.18.0-1nodesource1),
cups-browsed:amd64 (1.28.15-0ubuntu1.3, 1.28.15-0ubuntu1.4),
brave-browser:amd64 (1.70.119, 1.70.126),
code:amd64 (1.93.1-1726079302, 1.94.2-1728494015),
kubectl:amd64 (1:494.0.0-0, 1:496.0.0-0),
libcupsfilters1:amd64 (1.28.15-0ubuntu1.3, 1.28.15-0ubuntu1.4),
ruby-webrick:amd64 (1.7.0-3, 1.7.0-3ubuntu0.1)

I've tried rolling back libpskc0 and nodejs with no effect. The previous version of ovmf is not available in the repo.

Here is a manual configuration that works (/etc/NetworkManager/system-connections/Wired\ connection\ 1.nmconnection):

[connection]
id=Wired connection 1
uuid=a9d94420-f026-3f3f-bfdd-8142ae130e71
type=ethernet
autoconnect-priority=-100

[ethernet]

[ipv4]
address1=192.168.0.123/24,192.168.0.1
dns=8.8.8.8;
method=manual

[ipv6]
addr-gen-mode=stable-privacy
method=auto

[proxy]

And an automatic one that doesn't:

[connection]
id=Wired connection 1
uuid=a9d94420-f026-3f3f-bfdd-8142ae130e71
type=ethernet
autoconnect-priority=-100

[ethernet]

[ipv4]
method=auto

[ipv6]
addr-gen-mode=stable-privacy
method=auto

[proxy]

Here's the result of ifconfig with the non-working automatic config:

enx089204536db9: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet6 2601:207:680:29e2:d864:1ed3:f424:6a31  prefixlen 64  scopeid 0x0<global>
        inet6 fe80::b92c:2b5:5510:e58b  prefixlen 64  scopeid 0x20<link>
        inet6 2601:207:680:29e2:fb45:144e:3353:9272  prefixlen 64  scopeid 0x0<global>
        ether 08:92:04:53:6d:b9  txqueuelen 1000  (Ethernet)
        RX packets 40433  bytes 39759055 (39.7 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 18507  bytes 7483707 (7.4 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 16119  bytes 1722379 (1.7 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 16119  bytes 1722379 (1.7 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255
        ether 52:54:00:78:d9:8c  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

wlp0s20f3: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 4c:03:4f:c3:f5:5f  txqueuelen 1000  (Ethernet)
        RX packets 23  bytes 6925 (6.9 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 33  bytes 6203 (6.2 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Any thoughts on what could have caused this? How to fix? I don't mind manually configuring my wired connection, but this is a laptop and doing that for every new wifi connection will be a serious hassle.

Thanks for any help.

22.04