[Bug 34780] Re: [Bug 34780] bridge module, misbehaviour after suspending (or hibernating)

[Thomas Schwinge]

That's how it currently mostly (i.e. sometimes it also works as expected)
looks like after resuming from hibernation (I don't use suspend-to-RAM
very much):

#v+
thomas at dirichlet:~ $ brctl show
bridge name     bridge id               STP enabled     interfaces
br0_ifrename            8000.00112517b49d       no              eth0
thomas at dirichlet:~ $ ifconfig eth0
eth0      Link encap:Ethernet  HWaddr 00:11:25:17:B4:9D
          inet6 addr: fe80::211:25ff:fe17:b49d/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:255 errors:0 dropped:0 overruns:0 frame:0
          TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          RX bytes:16718 (16.3 KiB)  TX bytes:492 (492.0 b)
          Base address:0x8000 Memory:c0240000-c0260000

thomas at dirichlet:~ $ ifconfig br0
br0: error fetching interface information: Device not found
thomas at dirichlet:~ $ ifconfig br0_ifrename
br0_ifren Link encap:Ethernet  HWaddr 00:11:25:17:B4:9D
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

thomas at dirichlet:~ $ lsmod | grep bridge
bridge                 55764  0
#v-

What is this `br0_ifrename' device?  Is this perhaps just a deficiency in
your networking scripting works?


To get things going again I do the following:

#v+
thomas at dirichlet:~ $ sudo rmmod bridge
Password:
thomas at dirichlet:~ $ sudo rmmod bridge
thomas at dirichlet:~ $ sudo rmmod bridge
ERROR: Module bridge does not exist in /proc/modules
thomas at dirichlet:~ $ sudo ifup br0

Waiting for br0 to get ready (MAXWAIT is 302 seconds).
Internet Systems Consortium DHCP Client V3.0.3
Copyright 2004-2005 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/products/DHCP

Listening on LPF/br0/00:11:25:17:b4:9d
Sending on   LPF/br0/00:11:25:17:b4:9d
Sending on   Socket/fallback
DHCPDISCOVER on br0 to 255.255.255.255 port 67 interval 4
DHCPOFFER from 192.168.111.112
DHCPREQUEST on br0 to 255.255.255.255 port 67
DHCPACK from 192.168.111.112
bound to 192.168.111.245 -- renewal in 27257 seconds.
#v-

Yes, I can and do unload the bridge module two times.


Note that this report is differing to the original one in me having
changed from `ath0' (Atheros wireless) to `eth0'.  I could try to
reproduce this also with the `ath0' device, if there's interest.


I could also try to reproduce it using suspend-to-RAM instead of
suspend-to-disk, if there's interest.
-- 
bridge module, misbehaviour after suspending (or hibernating)
https://launchpad.net/malone/bugs/34780