Arch Linux

Xstary

Member

Registered: 2010-08-05

Posts: 20

Netctl: Sometimes no internet connection after boot

Before migration to netctl, internet over ethernet (dhcp over router) worked well.
Now I simply used the /etc/netctl/examples/ethernet-dhcp file as profile.
Then, sometimes after boot I have a internet connection and sometimes not.

Interesing: When I Have a connection:

$ netctl status ethernet-dhcp 
netctl@ethernet\x2ddhcp.service - A basic dhcp ethernet connection
   Loaded: loaded (/etc/systemd/system/netctl@ethernet\x2ddhcp.service; enabled)
   Active: failed (Result: exit-code) since So 2013-04-28 18:49:52 CEST; 11min ago
     Docs: man:netctl.profile(5)
  Process: 234 ExecStart=/usr/lib/network/network start %I (code=exited, status=1/FAILURE)

And when it is not working it is the same.

What is the problem here?
Thansk for any help!

Update

$ journalctl -xn
Jan 10 18:42:46 Arch-PC dhcpcd[1620]: eth0: if_init: Permission denied

The line is shown 10 times.

I just noticed that it occured that after boot in the command line I had no connection, after starting X it worked (but that´s not always the case! Maybe it was just time)

Last edited by Xstary (2013-04-28 19:33:47)

ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 20,676

Re: Netctl: Sometimes no internet connection after boot

DHCP is probably failing.  There are a couple threads hereabouts that describe how to increase the timeout.

When if fails, check the output of iw wlan0 info  (change wlan0 to whatever your card is called) and see if it is associated.  If so, you will know it is a DHCP problem.

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Xstary

Member

Registered: 2010-08-05

Posts: 20

Re: Netctl: Sometimes no internet connection after boot

Thanks, but it is no wlan but ethernet (see update).
I´ll check for "systemctl status dhcpcd@eth0.service" the next time the problem occurs.
Now when it´s working, the output includes "active(running)" and "(code=exited, status=0/SUCCESS)"

Update

Indeed:

$ systemctl status dhcpcd@eth0.service 
dhcpcd@eth0.service - dhcpcd on eth0
   Loaded: loaded (/usr/lib/systemd/system/dhcpcd@.service; enabled)
   Active: failed (Result: exit-code) since Mo 2013-04-29 08:16:45 CEST; 1min 19s ago
  Process: 233 ExecStart=/usr/sbin/dhcpcd -q -w %I (code=exited, status=1/FAILURE)

and

$ sudo systemctl restart  dhcpcd@eth0.service 
$ systemctl status dhcpcd@eth0.service 
dhcpcd@eth0.service - dhcpcd on eth0
   Loaded: loaded (/usr/lib/systemd/system/dhcpcd@.service; enabled)
   Active: active (running) since Mo 2013-04-29 08:18:42 CEST; 4min 59s ago
  Process: 1343 ExecStart=/usr/sbin/dhcpcd -q -w %I (code=exited, status=0/SUCCESS)
 Main PID: 1465 (dhcpcd)
   CGroup: name=systemd:/system/dhcpcd@.service/eth0
           └─1465 /usr/sbin/dhcpcd -q -w eth0

Then it works.

Wondering why this occured after migrating to netctl...
Still I don´t know what´s the problem, but I´ll look for it in other threads first now.

Last edited by Xstary (2013-04-29 06:27:30)