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As mentioned in this question I am using a firewire cable to provide a private network between my laptop and my desktop, because it makes using the screen sharing program synergy much nicer than using WIFI.

However when I leave my office for the day and I suspend my laptop, when I return the next day, the desktop and the laptop cannot communicate over firewire anymore. The firewire0 device still has an IP address. but when I try and ping the desktop I get no route to host

I'm using kernel 2.6.35-24-generic #42-Ubuntu SMP x86_64 on Ubuntu 10.10.

Is there some way I can remedy this without a reboot? Like, removing some kernel modules and re-inserting them?

Here's what I have tried so far and the results:

root@token:~# dmesg|tail -n 1
[592525.204024] firewire_core: phy config: card 0, new root=ffc1, gap_count=5

root@token:~# modprobe -r firewire_net firewire_ohci firewire_core
root@token:~# modprobe -v firewire_ohci
insmod /lib/modules/2.6.35-24-generic/kernel/lib/crc-itu-t.ko 
insmod /lib/modules/2.6.35-24-generic/kernel/drivers/firewire/firewire-core.ko 
insmod /lib/modules/2.6.35-24-generic/kernel/drivers/firewire/firewire-ohci.ko 

root@token:~# dmesg|tail
[592525.204024] firewire_core: phy config: card 0, new root=ffc1, gap_count=5
[592563.410868] firewire_ohci: Removed fw-ohci device.
[592579.160086] firewire_ohci: Added fw-ohci device 0000:02:00.0, OHCI v1.10, 4 IR + 8 IT contexts, quirks 0x2
[592579.160137] firewire_ohci: isochronous cycle inconsistent
[592579.660294] firewire_core: created device fw0: GUID 0000000000000000, S400
[592579.663805] firewire_core: created device fw1: GUID 0017f2fffe89bce6, S400
[592579.663813] firewire_core: phy config: card 0, new root=ffc1, gap_count=5
[592579.700720] firewire_core: phy config: card 0, new root=ffc1, gap_count=5
[592579.700842] firewire_core: refreshed device fw0
[592579.702603] firewire_net: firewire0: IPv4 over FireWire on device 0000000000000000

root@token:~# ping stan.firewire
PING stan.firewire ( 56(84) bytes of data.
From token.local ( icmp_seq=1 Destination Host Unreachable
From token.local ( icmp_seq=2 Destination Host Unreachable
From token.local ( icmp_seq=3 Destination Host Unreachable

I also tried removing the modules prior to suspending, and re-inserting after resuming. This did not work either :-(

EDIT: If I unplug and replug the firewire cable after resuming from suspend, I see the message:

firewire_core: BM lock failed, making local node (ffc0) root

I don't see this message when I unplug/replug before suspend...

share|improve this question

closed as too localized by fossfreedom Feb 19 '12 at 19:41

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center. If this question can be reworded to fit the rules in the help center, please edit the question.

This was crossposted from unix.stackexchange.com –  Josh Feb 14 '11 at 15:32
Hello, this question has no information and activity for a very long time. I am closing it for now. If by any reason you think this question is still viable or useful in anyways or that there is still a good chance it will be answered please flag it to a moderator or add a comment with the reasons why you want it open. Regards –  fossfreedom Feb 19 '12 at 19:41
Thanks @fossfreedom. I was never able to solve the problem and eventually just stopped trying. There probably is no answer! –  Josh Feb 20 '12 at 12:51