Public bug reported:
Binary package hint: network-manager
As requested by Mathieu Trudel in bug #274593, I'm opening a new bug.
If the DHCP server in the network goes down for some reason,
NetworkManager marks the connection invalid once DHCP request times out:
Nov 8 10:59:19 lempo NetworkManager[975]: <warn> (eth0): DHCPv4 request timed
out.
Nov 8 10:59:19 lempo NetworkManager[975]: <info> (eth0): canceled DHCP
transaction, DHCP client pid 6586
Nov 8 10:59:19 lempo NetworkManager[975]: <info> Activation (eth0) Stage 4 of
5 (IP4 Configure Timeout) scheduled...
Nov 8 10:59:19 lempo NetworkManager[975]: <info> Activation (eth0) Stage 4 of
5 (IP4 Configure Timeout) started...
Nov 8 10:59:19 lempo NetworkManager[975]: <info> Activation (eth0) Stage 5 of
5 (IP Configure Commit) scheduled...
Nov 8 10:59:19 lempo NetworkManager[975]: <info> Activation (eth0) Stage 4 of
5 (IP4 Configure Timeout) complete.
Nov 8 10:59:19 lempo NetworkManager[975]: <info> Activation (eth0) Stage 5 of
5 (IP Configure Commit) started...
Nov 8 10:59:19 lempo NetworkManager[975]: <info> Activation (eth0) Stage 5 of
5 (IP Configure Commit) failed (no IP configuration found)
Nov 8 10:59:19 lempo NetworkManager[975]: <info> (eth0): device state change:
7 -> 9 (reason 5)
Nov 8 10:59:19 lempo NetworkManager[975]: <info> Marking connection 'Auto
eth0' invalid.
Nov 8 10:59:19 lempo NetworkManager[975]: <warn> Activation (eth0) failed.
Nov 8 10:59:19 lempo NetworkManager[975]: <info> Activation (eth0) Stage 5 of
5 (IP Configure Commit) complete.
Nov 8 10:59:19 lempo NetworkManager[975]: <info> (eth0): device state change:
9 -> 3 (reason 0)
Nov 8 10:59:19 lempo NetworkManager[975]: <info> (eth0): deactivating device
(reason: 0).
If I now unplug and replug the network cable (a common fix for network
problems), NetworkManager does not try to get a new IP address via DHCP:
Nov 8 11:02:05 lempo NetworkManager[975]: <info> (eth0): carrier now OFF
(device state 3)
Nov 8 11:02:05 lempo NetworkManager[975]: <info> (eth0): device state change:
3 -> 2 (reason 40)
Nov 8 11:02:05 lempo NetworkManager[975]: <info> (eth0): deactivating device
(reason: 40).
Nov 8 11:02:07 lempo NetworkManager[975]: <info> (eth0): carrier now ON
(device state 2)
Nov 8 11:02:07 lempo NetworkManager[975]: <info> (eth0): device state change:
2 -> 3 (reason 40)
Rather, I must log on to my computer, click on the nm-applet and select
Auto eth0. This is highly inconvenient if I'm out of office and would
like to do something remotely. Otherwise I could just ask my colleague
to replug the cable.
** Affects: network-manager (Ubuntu)
Importance: Undecided
Status: New
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NetworkManager does not enable connection marked as invalid when plugging in
network cable
https://bugs.launchpad.net/bugs/672562
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