[Bug 1716034] Re: Network manager stops managing Ethernet links after upgrade

[Martin Pitt]

FTR, I don't want to blame the NetworkManager 1.2.6 SRU to xenial - that
new upstream version now evades the version test in the postinst, but of
course it's still that version test which is at fault. I don't see how
we can use a simple version test to determine the situation that we want
(one-time test after upgrading from 16.04 LTS), I suppose it needs to
move to "$2 is not empty" plus creating a migration stamp file
somewhere.

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Title:
  Network manager stops managing Ethernet links after upgrade

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[Bug 1716034] Re: Network manager stops managing Ethernet links after upgrade

[Zygmunt Krynicki]

Chatting with Martin it seems that an upload to xenial-updates has
broken the logic since the test in network-manager's postinst script is
now out out date.

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Title:
  Network manager stops managing Ethernet links after upgrade

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[Bug 1716034] Re: Network manager stops managing Ethernet links after upgrade

[Martin Pitt]

I'm sorry, I mean bug 1676547.

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Title:
  Network manager stops managing Ethernet links after upgrade

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[Bug 1716034] Re: Network manager stops managing Ethernet links after upgrade

[Martin Pitt]

Is that any better with the fix in bug 1690992? That sounds very much
like a duplicate?

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Title:
  Network manager stops managing Ethernet links after upgrade

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[Bug 1716034] Re: Network manager stops managing Ethernet links after upgrade

[Zygmunt Krynicki]

Looking at the changelog I see that the new conf.d file is a debian
addition. The relevant changelog says:

  * network-manager.postinst: Don't create
/etc/NetworkManager/conf.d/10-globally-managed-devices.conf override on
new installations. We don't want NM to manage non-wifi/wwan on
servers/cloud instances, and for desktops live-build now installs a
netplan policy snippet to let NM handle all devices.

 -- Martin Pitt   Thu, 18 Aug 2016 08:42:16
+0200


Yet on my system there was no netplan, netplan is a dependency of 
"ubuntu-standard". Installing ubuntu-standard hasn't changed anything. I wonder 
how this was expected to work on upgrades.

In any case, I think that the "wwan" vs "gsm" is a separate bug that
needs investigation.

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Title:
  Network manager stops managing Ethernet links after upgrade

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[Bug 1716034] Re: Network manager stops managing Ethernet links after upgrade

[Zygmunt Krynicki]

This also affected my machines. Thanks to the forum reference I was able
to piece together this:

The file belonging to network-manager /usr/lib/NetworkManager/conf.d/10
-globally-managed-devices.conf contains:

[keyfile]
unmanaged-devices=*,except:type:wifi,except:type:wwan

Curiously, at least on my machines, this also knocked out "gsm" type
connection which made me offline as I rely on 3G connections often.

The "solution" is to create an empty file at
/etc/NetworkManager/conf.d/10-globally-managed-devices.conf the presence
of which overrides the distribution packaged default.

I consider this a critical error as it can result in inability to
connect typical system to the network to pull in updates that would
resolve the problem.



** Changed in: network-manager (Ubuntu)
   Status: New => Confirmed

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Title:
  Network manager stops managing Ethernet links after upgrade

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