After downloading Jetpack 3, I tried to flash the Jetson and install Cuda 8.I tried to install using two different computers (wifi turned off).I wasn't able to install Cuda, I had an error.For both computers, after the failure during the installation, the ethernet connexion doesn't work anymore.I checked and compared with another computer the /etc/network/interfaces and /etc/NetworkManager/NetworkManager.conf files.My config is Ubuntu 16.04LTS, Jetson TX2, Jetpack 3.Computer and Jetson connected to a hub, connected to Internet.For now, I try to recover the ethernet connexion on my computer.Now, My computer is plugged into a hub which is connected to a DHCP server. (The Jetson TX2 is unplugged and JetPack not running).I tried these commands to figure out what was wrong.$ ifconfig eth0 (when I try to connect eth0)eth0      Link encap:Ethernet  HWaddr 28:f1:0e:48:52:d2        inet6 addr: 2607:f810:c20:16:2af1:eff:fe48:52d2/64 Scope:Global      inet6 addr: fe80::2af1:eff:fe48:52d2/64 Scope:Link      UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1      RX packets:17525 errors:0 dropped:104 overruns:0 frame:0      TX packets:366 errors:0 dropped:0 overruns:0 carrier:0      collisions:84 txqueuelen:1000       RX bytes:1709238 (1.7 MB)  TX bytes:70530 (70.5 KB)      Interrupt:16 Memory:dd400000-dd420000  I don't have an IPV4 address, So I guess that means the DHCP doesn't receive the request or can't send it.$ cat /etc/network/interfaces# interfaces(5) file used by ifup(8) and ifdown(8)auto loiface lo inet loopbackSeems good, I also tried to addauto eth0iface eth0 inet dhcpI got the same result.$ cat /etc/NetworkManager/NetworkManager.conf [main]plugins=ifupdown,keyfile,ofonodns=dnsmasq[ifupdown]managed=falseIf I put managed=true, I get an ifupdown connection that I can't set up.$ journalctl -fJul 07 18:35:05 toromachine dhclient[22025]: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 4 (xid=0x6a052979)Jul 07 18:35:09 toromachine dhclient[22025]: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 10 (xid=0x6a052979)Jul 07 18:35:19 toromachine dhclient[22025]: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 18 (xid=0x6a052979)Jul 07 18:35:37 toromachine dhclient[22025]: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 12 (xid=0x6a052979)Jul 07 18:35:47 toromachine NetworkManager[19050]: <warn> [1499477747.7752] dhcp4 (eth0): request timed outJul 07 18:35:47 toromachine NetworkManager[19050]: <info> [1499477747.7753] dhcp4 (eth0): state changed unknown -> timeoutJul 07 18:35:47 toromachine NetworkManager[19050]: <info> [1499477747.8079] dhcp4 (eth0): canceled DHCP transaction, DHCP client pid 22025Jul 07 18:35:47 toromachine NetworkManager[19050]: <info> [1499477747.8079] dhcp4 (eth0): state changed timeout -> doneJul 07 18:35:47 toromachine NetworkManager[19050]: <info> [1499477747.8086] device (eth0): state change: ip-config -> failed (reason 'ip-config-unavailable') [70 120 5]Jul 07 18:35:47 toromachine NetworkManager[19050]: <info> [1499477747.8091] manager: NetworkManager state is now DISCONNECTEDJul 07 18:35:47 toromachine NetworkManager[19050]: <warn> [1499477747.8098] device (eth0): Activation: failed for connection 'eth0'Jul 07 18:35:47 toromachine NetworkManager[19050]: <info> [1499477747.8113] device (eth0): state change: failed -> disconnected (reason 'none') [120 30 0]Jul 07 18:35:47 toromachine NetworkManager[19050]: <info> [1499477747.8151] policy: auto-activating connection 'eth0'Jul 07 18:35:47 toromachine NetworkManager[19050]: <info> [1499477747.8166] device (eth0): Activation: starting connection 'eth0' (e7361020-1796-4583-aab9-9d479aac94fe)Jul 07 18:35:47 toromachine NetworkManager[19050]: <info> [1499477747.8167] device (eth0): state change: disconnected -> prepare (reason 'none') [30 40 0]Jul 07 18:35:47 toromachine NetworkManager[19050]: <info> [1499477747.8168] manager: NetworkManager state is now CONNECTINGJul 07 18:35:47 toromachine NetworkManager[19050]: <info> [1499477747.8170] device (eth0): state change: prepare -> config (reason 'none') [40 50 0]Jul 07 18:35:47 toromachine NetworkManager[19050]: <info> [1499477747.8180] device (eth0): state change: config -> ip-config (reason 'none') [50 70 0]Jul 07 18:35:47 toromachine NetworkManager[19050]: <info> [1499477747.8182] dhcp4 (eth0): activation: beginning transaction (timeout in 45 seconds)Jul 07 18:35:47 toromachine NetworkManager[19050]: <info> [1499477747.8206] dhcp4 (eth0): dhclient started with pid 22043Jul 07 18:35:47 toromachine dhclient[22043]: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3 (xid=0x15238503)Jul 07 18:35:50 toromachine dhclient[22043]: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 5 (xid=0x15238503)Jul 07 18:35:55 toromachine dhclient[22043]: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 9 (xid=0x15238503)Jul 07 18:36:04 toromachine dhclient[22043]: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 11 (xid=0x15238503)Jul 07 18:36:15 toromachine dhclient[22043]: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 20 (xid=0x15238503)Jul 07 18:36:32 toromachine NetworkManager[19050]: <warn> [1499477792.7707] dhcp4 (eth0): request timed outJul 07 18:36:32 toromachine NetworkManager[19050]: <info> [1499477792.7708] dhcp4 (eth0): state changed unknown -> timeoutJul 07 18:36:32 toromachine NetworkManager[19050]: <info> [1499477792.7874] dhcp4 (eth0): canceled DHCP transaction, DHCP client pid 22043Jul 07 18:36:32 toromachine NetworkManager[19050]: <info> [1499477792.7875] dhcp4 (eth0): state changed timeout -> doneJul 07 18:36:32 toromachine NetworkManager[19050]: <info> [1499477792.7881] device (eth0): state change: ip-config -> failed (reason 'ip-config-unavailable') [70 120 5]Jul 07 18:36:32 toromachine NetworkManager[19050]: <info> [1499477792.7885] manager: NetworkManager state is now DISCONNECTEDJul 07 18:36:32 toromachine NetworkManager[19050]: <warn> [1499477792.7891] device (eth0): Activation: failed for connection 'eth0'Jul 07 18:36:32 toromachine NetworkManager[19050]: <info> [1499477792.7902] device (eth0): state change: failed -> disconnected (reason 'none') [120 30 0]Jul 07 18:36:32 toromachine NetworkManager[19050]: <info> [1499477792.7937] policy: auto-activating connection 'eth0'Jul 07 18:36:32 toromachine NetworkManager[19050]: <info> [1499477792.7945] device (eth0): Activation: starting connection 'eth0' (e7361020-1796-4583-aab9-9d479aac94fe)Jul 07 18:36:32 toromachine NetworkManager[19050]: <info> [1499477792.7954] device (eth0): state change: disconnected -> prepare (reason 'none') [30 40 0]Jul 07 18:36:32 toromachine NetworkManager[19050]: <info> [1499477792.7955] manager: NetworkManager state is now CONNECTINGJul 07 18:36:32 toromachine NetworkManager[19050]: <info> [1499477792.7958] device (eth0): state change: prepare -> config (reason 'none') [40 50 0]Jul 07 18:36:32 toromachine NetworkManager[19050]: <info> [1499477792.7969] device (eth0): state change: config -> ip-config (reason 'none') [50 70 0]Jul 07 18:36:32 toromachine NetworkManager[19050]: <info> [1499477792.7971] dhcp4 (eth0): activation: beginning transaction (timeout in 45 seconds)Jul 07 18:36:32 toromachine NetworkManager[19050]: <info> [1499477792.7984] dhcp4 (eth0): dhclient started with pid 22057For me, it can't send the request to the DHCP server. But it seems to discover some DHCP.$ cat /var/lib/NetworkManager/NetworkManager.state[main]NetworkingEnabled=trueWirelessEnabled=falseWWANEnabled=trueWimaxEnabled=trueSeems good. I manually desactivate the wireless.$ sudo dhcpdump -i eth0TIME: 2017-07-12 17:24:55.942    IP: 0.0.0.0 (c:51:1:e2:30:2b) > 255.255.255.255 (ff:ff:ff:ff:ff:ff)    OP: 1 (BOOTPREQUEST) HTYPE: 1 (Ethernet)  HLEN: 6  HOPS: 0   XID: 14ac6666  SECS: 3 FLAGS: 0CIADDR: 0.0.0.0YIADDR: 0.0.0.0SIADDR: 0.0.0.0GIADDR: 0.0.0.0CHADDR: 0c:51:01:e2:30:2b:00:00:00:00:00:00:00:00:00:00 SNAME: . FNAME: .OPTION:  53 (  1) DHCP message type         1 (DHCPDISCOVER)OPTION:  51 (  4) IP address leasetime      86400 (24h)OPTION:  12 ( 33) Host name                 dcs-airporttimecapsule-3042bainerOPTION:  55 (  7) Parameter Request List      1 (Subnet mask)                          2 (Time offset)                          3 (Routers)                         15 (Domainname)                          6 (DNS server)                         12 (Host name)                         44 (NetBIOS name server)OPTION:  57 (  2) Maximum DHCP message size 1500OPTION:  61 (  7) Client-identifier         01:0c:51:01:e2:30:2b---------------------------------------------------------------------------I hope someone will have some ideas to help me.
No Ethernet connexion after a failure to install Cuda with JetPack
linux;ubuntu;networking;ethernet