This happens also on debian stretch, on a MacBookPro12,1
solitone@alan:~$ uname -a
Linux alan 4.9.0-1-amd64 #1 SMP Debian 4.9.6-3 (2017-01-28) x86_64 GNU/Linux
Please notice that the same problem has also been reported here:
http://osdir.com/ml/network.networkmanager.devel/2006-05/msg00023.html
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network manager gives couldn't activate dialup service warning
https://bugs.launchpad.net/bugs/147119
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I also experience this issue, on release 7.10 (gutsy ):
[EMAIL PROTECTED]:~$ dpkg -s network-manager
Package: network-manager
Status: install ok installed
[...]
Architecture: amd64
Version: 0.6.5-0ubuntu16.7.10.0
The ppp0 interface is automatically activated, thus allowing to setup a dialup
con