Computer sending data while turned off
I have a some what strange problem (which could have an easy and obvious solution for all I know).
My problem is that when I've booted ubuntu (now 10.4 but same problem with 9.10) and turns it off it starts sending a HUGE amount of data via the ethernet cable, so much in fact that my router can't handle it and stops responding.
As far as I can tell the computer is completely turned off with no fans spinning. I can add that if I boot windows I do not have this problem, just when exiting ubuntu.
There are two "fixes" for my problem:
- Pull the ethernet cable until the next boot
- Turn off power to the PSU and wait for the capacitors to unload
Is there anyone who knows what could be going on? I'd be happy to post some logs or conf-files.
Currently I'm using the ethernet port on my motherboard which is a Asus P6T Deluxe V2 with an updated version of the BIOS (maybe not the latest but since it only happens when I've been in ubuntu I don't wanna mess with the BIOS too much).
Regards Nicklas
---------Update 1----------
The router is a D-Link DIR 655 with the latest firmware.
---------Update 2----------
I've now reinstalled ubuntu (with 10.4) and I still experience the same problem.
---------Update 3----------
Well I still haven't found a solution to this problem :(
I opened a topic in Ubuntu forums, and with their help, I made an workaround, that is working nicely so far. Check Topic here: http://ubuntuforums.org/showthread.php?p=9617739
What is indicating that your Ubuntu-shutting-down computer is sending data to your router?
I mean, do you have any other things to show that there was data being sent?
(for example, you might put a hub in the path and capture data on it while the shutdown is in progress... does that show such transfers?)
A simpler reason could be a driver malfunction causing the router to crash/stall.
Towards that end, it might help to publish your router specs too.
Update on your comment:
I am a little surprised with your problem. Do you by any-chance have a Wake-up-on-LAN configuration enabled in your PC-BIOS?
If you want to capture data between the router and the PC you will need another piece of hardware called a Hub which lets you 'tap' the wire between the PC and the Router (3 ethernet wires: 1 from PC, 1 from Router and a 3rd to a different PC capturing packets). Alternatively, if your router has more Ethernet ports and supports 'port-mirroring' you can pickup captures with that setup.