SOLVED!!! The hint to the solution was the content of networking.log:
run-parts: failed to exec /etc/network/if-up.d/static-routes: Exec format error run-parts: /etc/network/if-up.d/static-routes exited with return code 1 Failed to bring up lo. run-parts: failed to exec /etc/network/if-up.d/static-routes: Exec format error run-parts: /etc/network/if-up.d/static-routes exited with return code 1 ifup: post-up script failed. So I compared the /etc/network/if-up.d directories on my working 32-bit and 64-bit laptops. The difference was a single executable file on the 64-bit affected laptop but not on the unaffected 32-bit laptop: -rwxr-xr-x 1 root root 351 Oct 17 16:25 static-routes Which contains: ip route add unreachable 10.0.0.0/8 metric 999 ip route add unreachable 172.16.0.0/12 metric 999 ip route add unreachable 192.168.0.0/16 metric 999 ip route add unreachable 169.254.0.0/16 metric 999 ip route add unreachable 192.0.2.0/24 metric 999 ip route add unreachable 198.51.100.0/24 metric 999 ip route add unreachable 203.0.113.0/24 metric 999 I removed the executable bit (sudo chmod -x) and logged out and rebooted. My network was auto-started as it should!! I don't know why the release-upgrade put it there (I assume it did), but it was the culprit in this fiasco. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/1354924 Title: Networkmanager does not autoconnect to wireless network Status in “network-manager” package in Ubuntu: Confirmed Bug description: When adding a net wireless network and enable "connect automatically' networkmanager does not automatically connect to the network wenever possible. I'm running kubuntu 14.10 daily. ProblemType: Bug DistroRelease: Ubuntu 14.10 Package: network-manager 0.9.8.8-0ubuntu23 ProcVersionSignature: Ubuntu 3.16.0-6.11-generic 3.16.0-rc7 Uname: Linux 3.16.0-6-generic x86_64 ApportVersion: 2.14.5-0ubuntu4 Architecture: amd64 CurrentDesktop: KDE Date: Sun Aug 10 21:30:03 2014 IfupdownConfig: # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback InstallationDate: Installed on 2014-07-11 (29 days ago) InstallationMedia: Kubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140710) IpRoute: default via 192.168.0.2 dev wlan0 proto static 192.168.0.0/24 dev wlan0 proto kernel scope link src 192.168.0.213 metric 9 SourcePackage: network-manager UpgradeStatus: No upgrade log present (probably fresh install) nmcli-dev: DEVICE TYPE STATE DBUS-PATH wlan0 802-11-wireless connected /org/freedesktop/NetworkManager/Devices/1 eth0 802-3-ethernet unavailable /org/freedesktop/NetworkManager/Devices/0 nmcli-nm: RUNNING VERSION STATE NET-ENABLED WIFI-HARDWARE WIFI WWAN-HARDWARE WWAN running 0.9.8.8 connected enabled enabled enabled enabled disabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1354924/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
