4

I'm trying to setup netconsole to debug a hard lock up, and I am running into a problem. I have the following config for netconsole:

options netconsole [email protected]/wlan0,[email protected]/00:1e:d2:c4:72:54

During bootup I get the following spew:

[    5.256569] netconsole: local port 6666
[    5.256570] netconsole: local IP 192.168.1.114
[    5.256571] netconsole: interface wlan0
[    5.256572] netconsole: remote port 6666
[    5.256572] netconsole: remote IP 192.168.1.105
[    5.256573] netconsole: remote ethernet address 00:1e:d2:c4:72:54
[    5.256574] netconsole: wlan0 doesn't exist, aborting.
[    5.256575] netconsole: cleaning up

Not exactly sure what to do from here, any suggestions welcome.

Edit output of ip l for maco:

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
link/ether 00:1f:bc:09:45:b5 brd ff:ff:ff:ff:ff:ff
3: eth1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
link/ether 00:1f:bc:09:45:b6 brd ff:ff:ff:ff:ff:ff
4: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:14:6c:85:ad:fa brd ff:ff:ff:ff:ff:ff

Edit output of dmesg after modprobe error for kees:

[ 4557.261569] netconsole: local port 6666 
[ 4557.261573] netconsole: local IP 192.168.1.114
[ 4557.261576] netconsole: interface wlan0
[ 4557.261577] netconsole: remote port 6666
[ 4557.261580] netconsole: remote IP 192.168.1.105
[ 4557.261582] netconsole: remote ethernet address 00:1e:d2:c4:72:54
[ 4557.261585] netconsole: wlan0 doesn't support polling, aborting.
[ 4557.261587] netconsole: cleaning up
Improve this question
1
  • what's the output of ip l ?
    – maco
    Oct 11, 2010 at 19:45

2 Answers 2

Reset to default
1

This is your problem:

[ 4557.261585] netconsole: wlan0 doesn't support polling, aborting.

Netconsole needs a driver that supports polling which isn't the case with your wireless card. Could you try it with one of your Ethernet cards?

Improve this answer
1

If the netconsole module is loaded before the wireless network driver, it will not be able to find wlan0 yet, since it doesn't exist. If your hard lock is later in the boot process, you can get the wireless driver loaded first, and the use modprobe to manually load netconsole next.

For example, boot normally, verify that wlan0 is available (as you've done with ip l), then:

sudo modprobe netconsole [email protected]/wlan0,[email protected]/00:1e:d2:c4:72:54
Improve this answer
3
  • I get the following Error inserting netconsole (/lib/modules/2.6.32-25-generic/kernel/drivers/net/netconsole.ko): Unknown error 524
    – Jonathan Fischoff
    Oct 26, 2010 at 23:43
  • What does dmesg report when that happens?
    – Kees Cook
    Oct 27, 2010 at 5:47
  • I added the output to the question
    – Jonathan Fischoff
    Oct 27, 2010 at 18:35

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .