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#1 2015-02-04 02:54:56

vanitas
Member
From: Guangzhou, China
Registered: 2014-05-31
Posts: 16

[SOLVED] NetworkManager keeps on reconnecting

My NetworkManager keeps on reconnecting no matter whether I use wired or wireless network. This annoys me a few days.

I find that `sudo systemctl restart NetworkManager` could solve this problem temporarily. After reboot the problem arises again.

My system is up to date. And I am using Gnome 3.

Any idea why does it happen and how could I get rid of  it?

Last edited by vanitas (2015-02-04 04:01:10)

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#2 2015-02-04 02:57:52

frank604
Member
From: BC, Canada
Registered: 2011-04-20
Posts: 1,211

Re: [SOLVED] NetworkManager keeps on reconnecting

Do you have other network controlling services enabled?  dhcpcd? netctl? wicd? check systemctl.  Look into logs for journalctl?

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#3 2015-02-04 03:59:16

vanitas
Member
From: Guangzhou, China
Registered: 2014-05-31
Posts: 16

Re: [SOLVED] NetworkManager keeps on reconnecting

@frank604, I didn't enabled dhcpcd, netctl, or wicd.

I ran `journalctl -u NetworkManager.service` and noticed these lines:

Feb 04 10:36:52 xbull NetworkManager[4339]: <warn>  the dhcpcd backend does not support IPv6.
Feb 04 10:36:52 xbull NetworkManager[4339]: <info>  (enp4s0): device state change: activated -> failed (reason 'dhcp-start-failed') [100 120 15]

After some googling, I find this post: dhcpcd not work with NetworkManager 1.0.
Someone metions that NetworkManager 1.0 embed an internal DHCP client, and the DHCP client does not support IPv6 yet.

I edit the connection and disable IPv6, then the problem disappears.

Thanks for your help!

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