Hi,
It's the 1st time I happen to have problems with the wired connection. (big surprise)
I have been using wired connection with Ubuntu for many years. (sometimes using wifi for testing)
What I did:
1. I upgraded from ubuntu 15.10 to 16.04 LTS - this version has big problem with X window due to ATI video driver. However, I can still use the system via ssh. The wired connection is OK.
2. Then I upgraded from 16.04 LTS to 17.04. It skipped the 16.10 because ubuntu has a new policy.
3. When finished the upgrade, looking OK, I reboot the system. And I lose the wired connection. (later I found wifi connection is OK)
I have no clue, so I grep-ed the messages of NetworkManager from syslog as below. Please help indicate what's wrong:
(lspci:
00:00.0 Host bridge: Intel Corporation 3rd Gen Core processor DRAM Controller (rev 09)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor PCI Express Root Port (rev 09)
00:14.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB xHCI Host Controller (rev 04)
00:16.0 Communication controller: Intel Corporation 7 Series/C216 Chipset Family MEI Controller #1 (rev 04)
00:1a.0 USB controller: Intel Corporation 7 Series/C216 Chipset Family USB Enhanced Host Controller #2 (rev 04)
00:1b.0 Audio device: Intel Corporation 7 Series/C216 Chipset Family High Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 7 Series/C216 Chipset Family PCI Express Root Port 1 (rev c4)
00:1c.2 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 3 (rev c4)
00:1c.3 PCI bridge: Intel Corporation 7 Series/C216 Chipset Family PCI Express Root Port 4 (rev c4)
...
08:00.0 Network controller: Qualcomm Atheros AR9485 Wireless Network Adapter (rev 01)
09:00.0 Ethernet controller: Qualcomm Atheros AR8151 v2.0 Gigabit Ethernet (rev c0)
)
syslog:
Sep 18 17:46:58 x NM[4079]: <info> caught SIGTERM, shutting down normally.
Sep 18 17:46:58 x NM[4079]: <info> device (wlan0): state change: unavailable -> unmanaged (reason 'unmanaged') [20 10 3]
Sep 18 17:46:58 x NM[4079]: <info> device (wlan0): set-hw-addr: reset MAC address to 20:16:D8:53:52:14 (unmanage)
Sep 18 17:46:58 x NM[4079]: <info> exiting (success)
Sep 18 17:46:58 x NM[8210]: <info> NetworkManager (version 1.4.4) is starting...
Sep 18 17:46:58 x NM[8210]: <info> Read config: /etc/NetworkManager/NetworkManager.conf (lib: 10-dns-resolved.conf, 10-globally-managed-devices.conf) (etc: default-wifi-powersave-on.conf)
Sep 18 17:46:58 x NM[8210]: <info> manager[0x5557f19e3040]: monitoring kernel firmware directory '/lib/firmware'.
Sep 18 17:46:58 x NM[8210]: <info> monitoring ifupdown state file '/run/network/ifstate'.
Sep 18 17:46:58 x NM[8210]: <info> dns-mgr[0x5557f19dc970]: init: dns=systemd-resolved, rc-manager=symlink, plugin=systemd-resolved
Sep 18 17:46:58 x NM[8210]: <info> rfkill1: found WiFi radio killswitch (at /sys/devices/pci0000:00/0000:00:1c.2/0000:08:00.0/ieee80211/phy0/rfkill1) (driver ath9k)
Sep 18 17:46:58 x NM[8210]: <info> init!
Sep 18 17:46:58 x NM[8210]: <info> management mode: managed
Sep 18 17:46:58 x NM[8210]: <info> devices added (path: /sys/devices/pci0000:00/0000:00:1c.2/0000:08:00.0/net/wlan0, iface: wlan0)
Sep 18 17:46:58 x NM[8210]: <info> device added (path: /sys/devices/pci0000:00/0000:00:1c.2/0000:08:00.0/net/wlan0, iface: wlan0): no ifupdown configuration found.
Sep 18 17:46:58 x NM[8210]: <info> devices added (path: /sys/devices/pci0000:00/0000:00:1c.3/0000:09:00.0/net/eth0, iface: eth0)
Sep 18 17:46:58 x NM[8210]: <info> device added (path: /sys/devices/pci0000:00/0000:00:1c.3/0000:09:00.0/net/eth0, iface: eth0): no ifupdown configuration found.
Sep 18 17:46:58 x NM[8210]: <info> devices added (path: /sys/devices/virtual/net/lo, iface: lo)
Sep 18 17:46:58 x NM[8210]: <info> device added (path: /sys/devices/virtual/net/lo, iface: lo): no ifupdown configuration found.
Sep 18 17:46:58 x NM[8210]: <info> end _init.
Sep 18 17:46:58 x NM[8210]: <info> settings: loaded plugin ifupdown: (C) 2008 Canonical Ltd. To report bugs please use the NetworkManager mailing list. (/usr/lib/x86_64-linux-gnu/NetworkManager/libnm-settings-plugin-ifupdown.so)
Sep 18 17:46:58 x NM[8210]: <info> settings: loaded plugin keyfile: (c) 2007 - 2015 Red Hat, Inc. To report bugs please use the NetworkManager mailing list.
Sep 18 17:46:58 x NM[8210]: <info> (-241193856) ... get_connections.
Sep 18 17:46:58 x NM[8210]: <info> (-241193856) connections count: 0
Sep 18 17:46:58 x NM[8210]: <info> keyfile: new connection /etc/NetworkManager/system-connections/自動乙太網路 (3b11add1-64a8-4acf-a881-e46ff1a61012,"自動乙太網路")
Sep 18 17:46:58 x NM[8210]: <info> keyfile: new connection /etc/NetworkManager/system-connections/keya (de9404b9-efa2-41d5-9499-89cb55df2567,"keya")
Sep 18 17:46:58 x NM[8210]: <info> settings: hostname: using hostnamed
Sep 18 17:46:58 x NM[8210]: <info> settings: hostname changed from (none) to "snow"
Sep 18 17:46:58 x NM[8210]: <info> dhcp-init: Using DHCP client 'dhclient'
Sep 18 17:46:58 x NM[8210]: <info> manager: WiFi disabled by radio killswitch; disabled by state file
Sep 18 17:46:58 x NM[8210]: <info> manager: WWAN enabled by radio killswitch; enabled by state file
Sep 18 17:46:58 x NM[8210]: <info> manager: Networking is enabled by state file
Sep 18 17:46:58 x NM[8210]: <info> Loaded device plugin: NMVxlanFactory (internal)
Sep 18 17:46:58 x NM[8210]: <info> Loaded device plugin: NMVlanFactory (internal)
Sep 18 17:46:58 x NM[8210]: <info> Loaded device plugin: NMVethFactory (internal)
Sep 18 17:46:58 x NM[8210]: <info> Loaded device plugin: NMTunFactory (internal)
Sep 18 17:46:58 x NM[8210]: <info> Loaded device plugin: NMMacvlanFactory (internal)
Sep 18 17:46:58 x NM[8210]: <info> Loaded device plugin: NMIPTunnelFactory (internal)
Sep 18 17:46:58 x NM[8210]: <info> Loaded device plugin: NMInfinibandFactory (internal)
Sep 18 17:46:58 x NM[8210]: <info> Loaded device plugin: NMEthernetFactory (internal)
Sep 18 17:46:58 x NM[8210]: <info> Loaded device plugin: NMBridgeFactory (internal)
Sep 18 17:46:58 x NM[8210]: <info> Loaded device plugin: NMBondFactory (internal)
Sep 18 17:46:58 x NM[8210]: <info> Loaded device plugin: NMAtmManager (/usr/lib/x86_64-linux-gnu/NetworkManager/libnm-device-plugin-adsl.so)
Sep 18 17:46:58 x NM[8210]: <info> Loaded device plugin: NMWwanFactory (/usr/lib/x86_64-linux-gnu/NetworkManager/libnm-device-plugin-wwan.so)
Sep 18 17:46:58 x NM[8210]: <info> Loaded device plugin: NMWifiFactory (/usr/lib/x86_64-linux-gnu/NetworkManager/libnm-device-plugin-wifi.so)
Sep 18 17:46:58 x NM[8210]: <info> Loaded device plugin: NMBluezManager (/usr/lib/x86_64-linux-gnu/NetworkManager/libnm-device-plugin-bluetooth.so)
Sep 18 17:46:58 x NM[8210]: ((devic): assertion '<dropped>' failed
Sep 18 17:46:58 x NM[8210]: <info> device (lo): link connected
Sep 18 17:46:58 x NM[8210]: <info> manager: (lo): new Generic device (/org/freedesktop/NetworkManager/Devices/0)
Sep 18 17:46:58 x NM[8210]: <info> manager: (eth0): new Ethernet device (/org/freedesktop/NetworkManager/Devices/1)
Sep 18 17:46:58 x NM[8210]: <info> (wlan0): using nl80211 for WiFi device control
Sep 18 17:46:58 x NM[8210]: <info> device (wlan0): driver supports Access Point (AP) mode
Sep 18 17:46:58 x NM[8210]: <info> manager: (wlan0): new 802.11 WiFi device (/org/freedesktop/NetworkManager/Devices/2)
Sep 18 17:46:58 x NM[8210]: <info> device (wlan0): state change: unmanaged -> unavailable (reason 'managed') [10 20 2]
Sep 18 17:46:58 x NM[8210]: <info> device (wlan0): set-hw-addr: set MAC address to D6:4A:25:CB:D3:FC (scanning)
Sep 18 17:46:58 x NM[8210]: <info> manager: startup complete
Sep 18 17:46:58 x NM[8210]: <info> urfkill disappeared from the bus
Sep 18 17:46:59 x NM[8210]: <info> bluez: use BlueZ version 5
Sep 18 17:46:59 x NM[8210]: <info> ModemManager available in the bus
Sep 18 17:46:59 x NM[8210]: <info> supplicant: wpa_supplicant running
Sep 18 17:46:59 x NM[8210]: <info> keyfile: add connection in-memory (2a25ced1-bfd1-4f26-9582-4e0a26bc10eb,"黃興菊 (Galaxy Grand2) 網路")
Sep 18 17:46:59 x NM[8210]: <info> bluez: BT device 黃興菊 (Galaxy Grand2) (20:D3:90:AA:B5:C5) added (NAP)
Sep 18 17:46:59 x NM[8210]: <info> manager: (20:D3:90:AA:B5:C5): new Bluetooth device (/org/freedesktop/NetworkManager/Devices/3)
Sep 18 17:47:09 x NM[8210]: <info> manager: WiFi hardware radio set disabled
Sep 18 17:47:09 x NM[8210]: <info> manager: WWAN hardware radio set enabled
