I have been trying to get this working for some time. I can offer some
observations but no answers.
1, This is the same symptom with USB and Bluetooth and other devices.
2, On first insertion of USB cable network comes up OK. Looking at
/var/log/syslog
Jul 25 13:23:43 bwing kernel: [326431.367963] usb 1-1: new full speed USB
device using ohci_hcd and address 86
Jul 25 13:23:43 bwing kernel: [326431.465212] usb 1-1: configuration #1 chosen
from 1 choice
Jul 25 13:23:43 bwing kernel: [326431.477055] usb0: register 'cdc_subset' at
usb-0000:00:02.0-1, Linux Device, 36:ea:bb:7e:ac:8c
Jul 25 13:23:43 bwing NetworkManager: <debug info>^I[1185333823.529149]
nm_hal_device_added (): New device added (hal udi is
'/org/freedesktop/Hal/devices/usb_device_49f_505a_noserial').
Jul 25 13:23:43 bwing NetworkManager: <debug info>^I[1185333823.635551]
nm_hal_device_added (): New device added (hal udi is
'/org/freedesktop/Hal/devices/usb_device_ffffffff_ffffffff_noserial').
Jul 25 13:23:43 bwing NetworkManager: <debug info>^I[1185333823.683519]
nm_hal_device_added (): New device added (hal udi is
'/org/freedesktop/Hal/devices/net_36_ea_bb_7e_ac_8c').
Jul 25 13:23:43 bwing NetworkManager: <debug info>^I[1185333823.735785]
nm_hal_device_added (): New device added (hal udi is
'/org/freedesktop/Hal/devices/usb_device_49f_505a_noserial_usbraw').
Jul 25 13:23:45 bwing avahi-daemon[4925]: Registering new address record for
fe80::34ea:bbff:fe7e:ac8c on usb0.*.
Jul 25 13:23:47 bwing avahi-daemon[4925]: Joining mDNS multicast group on
interface usb0.IPv4 with address 192.168.211.2.
Jul 25 13:23:47 bwing avahi-daemon[4925]: New relevant interface usb0.IPv4 for
mDNS.
Jul 25 13:23:47 bwing avahi-daemon[4925]: Registering new address record for
192.168.211.2 on usb0.IPv4.
Jul 25 13:23:53 bwing kernel: [326436.318568] usb0: no IPv6 routers present
3, Removal USB cable leaves an entry for usb0=usb0 in /var/run/network/ifstate
dhclient is still running
1097 ? S<s 0:00 dhclient3 -pf /var/run/dhclient.usb0.pid -lf
/var/lib/dhcp3/dhclient.usb0.leases usb0
4, Insertion of USB Cable /var/log/syslog seems avahi-daemon misses out
Jul 25 13:28:32 bwing kernel: [326564.547139] usb 1-1: new full speed USB
device using ohci_hcd and address 87
Jul 25 13:28:33 bwing kernel: [326564.651096] usb 1-1: configuration #1 chosen
from 1 choice
Jul 25 13:28:33 bwing NetworkManager: <debug info>^I[1185334113.086586]
nm_hal_device_added (): New device added (hal udi is
'/org/freedesktop/Hal/devices/usb_device_49f_505a_noserial').
Jul 25 13:28:33 bwing kernel: [326564.662938] usb0: register 'cdc_subset' at
usb-0000:00:02.0-1, Linux Device, 36:ea:bb:7e:ac:8c
Jul 25 13:28:33 bwing NetworkManager: <debug info>^I[1185334113.210916]
nm_hal_device_added (): New device added (hal udi is
'/org/freedesktop/Hal/devices/usb_device_ffffffff_ffffffff_noserial').
Jul 25 13:28:33 bwing NetworkManager: <debug info>^I[1185334113.269558]
nm_hal_device_added (): New device added (hal udi is
'/org/freedesktop/Hal/devices/net_36_ea_bb_7e_ac_8c').
Jul 25 13:28:33 bwing NetworkManager: <debug info>^I[1185334113.286177]
nm_hal_device_added (): New device added (hal udi is
'/org/freedesktop/Hal/devices/usb_device_49f_505a_noserial_usbraw').
Jul 25 13:28:34 bwing avahi-daemon[4925]: Registering new address record for
fe80::34ea:bbff:fe7e:ac8c on usb0.*.
Jul 25 13:28:43 bwing kernel: [326569.350530] usb0: no IPv6 routers present
5, Remove USB cable and remove usb0=usb0 from /var/run/network/ifstate,
reinsert USB cable and interface comes up
Jul 25 13:36:34 bwing kernel: [326784.925296] usb 1-1: new full speed USB
device using ohci_hcd and address 88
Jul 25 13:36:35 bwing kernel: [326785.029234] usb 1-1: configuration #1 chosen
from 1 choice
Jul 25 13:36:35 bwing NetworkManager: <debug info>^I[1185334595.131111]
nm_hal_device_added (): New device added (hal udi is
'/org/freedesktop/Hal/devices/usb_device_49f_505a_noserial').
Jul 25 13:36:35 bwing kernel: [326785.041068] usb0: register 'cdc_subset' at
usb-0000:00:02.0-1, Linux Device, 36:ea:bb:7e:ac:8c
Jul 25 13:36:35 bwing NetworkManager: <debug info>^I[1185334595.237684]
nm_hal_device_added (): New device added (hal udi is
'/org/freedesktop/Hal/devices/usb_device_ffffffff_ffffffff_noserial').
Jul 25 13:36:35 bwing NetworkManager: <debug info>^I[1185334595.296186]
nm_hal_device_added (): New device added (hal udi is
'/org/freedesktop/Hal/devices/usb_device_49f_505a_noserial_usbraw').
Jul 25 13:36:35 bwing NetworkManager: <debug info>^I[1185334595.321154]
nm_hal_device_added (): New device added (hal udi is
'/org/freedesktop/Hal/devices/net_36_ea_bb_7e_ac_8c').
Jul 25 13:36:36 bwing avahi-daemon[4925]: Registering new address record for
fe80::34ea:bbff:fe7e:ac8c on usb0.*.
Jul 25 13:36:40 bwing avahi-daemon[4925]: Joining mDNS multicast group on
interface usb0.IPv4 with address 192.168.211.2.
Jul 25 13:36:40 bwing avahi-daemon[4925]: New relevant interface usb0.IPv4 for
mDNS.
Jul 25 13:36:40 bwing avahi-daemon[4925]: Registering new address record for
192.168.211.2 on usb0.IPv4.
Jul 25 13:36:45 bwing kernel: [326789.737778] usb0: no IPv6 routers present
6, Set USB interface to static, network restart, remove cable, reinsert
cable, entry usb0=usb0 still in /var/run/network/ifstate,
Jul 25 13:40:46 bwing kernel: [326899.141939] usb 1-1: new full speed USB
device using ohci_hcd and address 89
Jul 25 13:40:46 bwing kernel: [326899.244029] usb 1-1: configuration #1 chosen
from 1 choice
Jul 25 13:40:46 bwing NetworkManager: <debug info>^I[1185334846.505753]
nm_hal_device_added (): New device added (hal udi is
'/org/freedesktop/Hal/devices/usb_device_49f_505a_noserial').
Jul 25 13:40:46 bwing kernel: [326899.255893] usb0: register 'cdc_subset' at
usb-0000:00:02.0-1, Linux Device, 36:ea:bb:7e:ac:8c
Jul 25 13:40:46 bwing NetworkManager: <debug info>^I[1185334846.598956]
nm_hal_device_added (): New device added (hal udi is
'/org/freedesktop/Hal/devices/usb_device_ffffffff_ffffffff_noserial').
Jul 25 13:40:46 bwing NetworkManager: <debug info>^I[1185334846.665634]
nm_hal_device_added (): New device added (hal udi is
'/org/freedesktop/Hal/devices/usb_device_49f_505a_noserial_usbraw').
Jul 25 13:40:46 bwing NetworkManager: <debug info>^I[1185334846.667092]
nm_hal_device_added (): New device added (hal udi is
'/org/freedesktop/Hal/devices/net_36_ea_bb_7e_ac_8c').
Jul 25 13:40:48 bwing avahi-daemon[4925]: Registering new address record for
fe80::34ea:bbff:fe7e:ac8c on usb0.*.
Jul 25 13:40:57 bwing kernel: [326904.249517] usb0: no IPv6 routers present
ifconfig shows
usb0 Link encap:Ethernet HWaddr 36:EA:BB:7E:AC:8C
inet6 addr: fe80::34ea:bbff:fe7e:ac8c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:468 (468.0 b)
7, Remove USB cable and remove usb0=usb0 entry in
/var/run/network/ifstate, reinsert USB cable and interface comes up
Jul 25 13:44:44 bwing kernel: [327007.379280] usb 1-1: new full speed USB
device using ohci_hcd and address 90
Jul 25 13:44:44 bwing NetworkManager: <debug info>^I[1185335084.710528]
nm_hal_device_added (): New device added (hal udi is
'/org/freedesktop/Hal/devices/usb_device_49f_505a_noserial').
Jul 25 13:44:44 bwing kernel: [327007.479541] usb 1-1: configuration #1 chosen
from 1 choice
Jul 25 13:44:44 bwing kernel: [327007.491386] usb0: register 'cdc_subset' at
usb-0000:00:02.0-1, Linux Device, 36:ea:bb:7e:ac:8c
Jul 25 13:44:44 bwing NetworkManager: <debug info>^I[1185335084.815553]
nm_hal_device_added (): New device added (hal udi is
'/org/freedesktop/Hal/devices/usb_device_ffffffff_ffffffff_noserial').
Jul 25 13:44:44 bwing NetworkManager: <debug info>^I[1185335084.879090]
nm_hal_device_added (): New device added (hal udi is
'/org/freedesktop/Hal/devices/net_36_ea_bb_7e_ac_8c').
Jul 25 13:44:44 bwing NetworkManager: <debug info>^I[1185335084.895657]
nm_hal_device_added (): New device added (hal udi is
'/org/freedesktop/Hal/devices/usb_device_49f_505a_noserial_usbraw').
Jul 25 13:44:44 bwing avahi-daemon[4925]: Joining mDNS multicast group on
interface usb0.IPv4 with address 192.188.211.2.
Jul 25 13:44:44 bwing avahi-daemon[4925]: New relevant interface usb0.IPv4 for
mDNS.
Jul 25 13:44:44 bwing avahi-daemon[4925]: Registering new address record for
192.188.211.2 on usb0.IPv4.
Jul 25 13:44:46 bwing avahi-daemon[4925]: Registering new address record for
fe80::34ea:bbff:fe7e:ac8c on usb0.*.
Jul 25 13:44:55 bwing kernel: [327012.206993] usb0: no IPv6 routers present
Summary:
1, This is not a DHCP problem, However dhcpc seems to have the -r option turned
on hard. (See previous post) This should not be the case.
2, This is not only USB network layer but involves other interfaces as well.
3, This is a serious bug. It means that you cannot remove and reinsert USB and
other network devices and expect them to work. It used to in hotplug :(
4, Lingering usb0=usb0 entry in /var/run/network/ifstate is a concern
5, if you do an ifdown usb0 (Even if it is not connected) this removes
usb0=usb0 entry in /var/run/network/ifstate and networking comes up next time
you plug in USB
6, If you manually remove usb0=usb0 entry in /var/run/network/ifstate and
networking comes up next time you plug in USB
Cheers
--
dhclient3 keeps running after ifdown
https://bugs.launchpad.net/bugs/38140
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