A start job is running for raise network interfaces (5 mins 1 sec) in ubuntu16.04

[thaniyarasu-gmail]

i have installed ubuntu 16.04 in my laptop.
starting ubuntu is fast when i have LAN cabled connected.

when LAN cable disconnected then it is taking around 5 minutes to get login screen.
it was showing this message with timer on screen at that long time.
"A start job is running for raise network interfaces (2 minutes of 5 mins 1 sec)"

1) how can i skip this delay (5 mins for waiting network).
like if there are some shortcut keys which i typed then the startup script should not wait for 5 mins, it should directly skip the network interface checking and go to login screen.

or
2) how can i permanently stop network interface check only when LAN cable not connected.

Thanks
Thani

[grahammechanical]

Do you want my guess?

The system is set up to make a wired connection to the router and to do that automatically. But is cannot complete the task because the ethernet cable is disconnected. So, it tries again and again until finally some part of the OS gets the message.

There should be an icon on the top panel for the Network Manager. With the cable connected the icon will be two arrows going in the opposite direction. With the cable disconnected the icon will look like an upside down cone. Click on the icon; select Edit Connections; Select Wired Connection; Click Edit; Go to the General tab and untick the box labelled "Automatically connect to this network when it is available."

In future when you want to make a wired connection to the router, then Click on the Network Manager icon and untick & re-tick Enable Networking. That should prompt Network Manager to start making the wired connection to the router.

Regards.

[thaniyarasu-gmail]

there is no "Wired Connection" in that dialog panel.
my ubuntu is 16.04

[houstonbofh]

Don't feel bad... I started testing Ubuntu Server 16.04 today and this bit me too. And there is no Network Manager, so it is probably something in the new systemd network services. Sorry, but I do not have a fix yet.

[matt_symes]

Hi

You may want to read this.

https://www.freedesktop.org/wiki/Software/systemd/NetworkTarget/

I would be looking to disable


systemd-networkd-wait-online.service

or


NetworkManager-wait-online.service

Look to see which ones are enabled with...


systemctl status systemd-networkd-wait-online.service

systemctl status NetworkManager-wait-online.service

Disable one and, if it does not fix it, re-enable it and disable the other one.

Here's an example


sudo systemctl disable systemd-networkd-wait-online.service


sudo systemctl enable systemd-networkd-wait-online.service

When enabled (and from the website above)


This will ensure that all configured network devices are up and have an IP address assigned before boot continues.

Please post back if either work and post which one does work.

Kind regards

[senpai2]

You can reduce the timeout for the job that is trying to raise the network interfaces in the following file.


/etc/systemd/system/network-online.targets.wants/networking.service

Simply edit the file


sudo vi /etc/systemd/system/network-online.targets.wants/networking.service

You can change the following line to your preference.


21:TimeoutStartSec=5min

You will need to reload the daemon as well.


sudo systemctl daemon-reload


Note: If any of your specified network interfaces fail to respond in your new timeout, it will not be raised. This failure will be indicated at boot when this job is ran.

[houstonbofh]

You can reduce the timeout for the job that is trying to raise the network interfaces in the following file.


/etc/systemd/system/network-online.targets.wants/networking.service

Simply edit the file


sudo vi /etc/systemd/system/network-online.targets.wants/networking.service


You are a wonderful person! That worked! Other then that path is actually a link to /lib/systemd/system/networking.service but that was the key!


21:TimeoutStartSec=30sec

[thaniyarasu-gmail]

i am ok with

21:TimeoutStartSec=30sec

Thanks

[physicist1616]

Don't feel bad... I started testing Ubuntu Server 16.04 today and this bit me too. And there is no Network Manager, so it is probably something in the new systemd network services. Sorry, but I do not have a fix yet.

The fix for Ubuntu Server is pretty simple: Change the line in /etc/network/interfaces that reads, "auto {Your ethernet adapter's name here}" to "allow-hotplug {Your ethernet adapter's name here}".
It's waiting for a DHCP reply, if my Wireshark-Fu is correct.

In my case, that looks like:


#Original Line
auto ens34
iface ens34 inet dhcp

#New line
allow-hotplug ens34
iface ens34 inet dhcp

It's reasonable to suggest that setting a static IP would do it too.

I don't know the equivalent in the GUI stuff.

If you are indeed rolling with a PC that is hotplugging ethernet (like a laptop), this is the most correct fix, as it informs the system that this network shouldn't be required on startup, and, if you wanted, you could still configure another network that is auto that *is* required on startup.

[nielsduelund]

That seems to be not just a workaround, but the actual solution. To me at least :-D
It seems to me that this is the way that network connections used to work when specifying auto.

[poulad]

I ran this command and it solved my problem. I guess I still need to compile and install my Ethernet driver.


sudo systemctl disable networking.service

[Tadaen_Sylvermane]

In /etc/network/interfaces change auto to allow-hotplug for the appropriate interface.

This should only be an issue in server version

[yerivan]

This just work for me too!!
TimeoutStartSec=10sec
But I set it to 10 sec and when I reboot the system it shows me failed when look for network interfaces.:D

[arpaham]

The fix for Ubuntu Server is pretty simple: Change the line in /etc/network/interfaces that reads, "auto {Your ethernet adapter's name here}" to "allow-hotplug {Your ethernet adapter's name here}".
It's waiting for a DHCP reply, if my Wireshark-Fu is correct.

In my case, that looks like:


#Original Line
auto ens34
iface ens34 inet dhcp

#New line
allow-hotplug ens34
iface ens34 inet dhcp

It's reasonable to suggest that setting a static IP would do it too.

I don't know the equivalent in the GUI stuff.

If you are indeed rolling with a PC that is hotplugging ethernet (like a laptop), this is the most correct fix, as it informs the system that this network shouldn't be required on startup, and, if you wanted, you could still configure another network that is auto that *is* required on startup.


Thanks a lot!!
A have a Acer Netbook AspireOne and this one was the best solution for me.
Now everything works without that awful timeout countdown. :D

[glebaron2]

The fix for Ubuntu Server is pretty simple: Change the line in /etc/network/interfaces that reads, "auto {Your ethernet adapter's name here}" to "allow-hotplug {Your ethernet adapter's name here}".
It's waiting for a DHCP reply, if my Wireshark-Fu is correct.

In my case, that looks like:


#Original Line
auto ens34
iface ens34 inet dhcp

#New line
allow-hotplug ens34
iface ens34 inet dhcp

It's reasonable to suggest that setting a static IP would do it too.

I don't know the equivalent in the GUI stuff.

If you are indeed rolling with a PC that is hotplugging ethernet (like a laptop), this is the most correct fix, as it informs the system that this network shouldn't be required on startup, and, if you wanted, you could still configure another network that is auto that *is* required on startup.

This was the correct answer for me! A rather small but critical difference if you are installing the server version and you want to run it using dhcp.
I changed this setting and all the network flakiness disappeared.

[whit-launchpad]

Does anyone know the logic of wanting 5 minutes? That seems a crazy default -- especially when the default splash screen gives no indication of what's broken. What variety of network trouble would clear by itself after the first minute of waiting?

Thanks for the useful explanations here.

[houstonbofh]

Does anyone know the logic of wanting 5 minutes? That seems a crazy default -- especially when the default splash screen gives no indication of what's broken. What variety of network trouble would clear by itself after the first minute of waiting?

I have given up asking questions like that. Usually there is no answer. But sometimes there is an answer, and that is actually worse. (Like: We did it so it boots faster!)

[ramesh24]

To reduce the waiting time:
Edit the file /etc/dhcp/dhclient.conf
to set timeout to a minimum time like: timeout 15

[hawk291]

Thank you physicist1616, your solution helped me.

/etc/network/interfaces

#Original Line
auto ens34
iface ens34 inet dhcp

#New line
allow-hotplug ens34
iface ens34 inet dhcp

[chris.herman]

Do you want my guess?
The system is set up to make a wired connection to the router and to do that automatically. But is cannot complete the task because the ethernet cable is disconnected.
Regards.

8 years later this comment helped me. Thanks.
(router power plug... bummer...)