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Today for the 4th time this month,
Ubuntu suddenly disables my Ethernet,
I'm connected through Alcatel Speed Touch (yeah I know it's an oldie).
I tried to log out and log back in, tried ifconfig and it didn't recognized
any Ethernet modem connected.
Only after a reset did it work... like every time before.
Any ideas?

Tried to enter
/etc/init.d/gdm restart
and then after the gui restarted
sudo dhclient eth0

That worekd, but I still want to know what's wrong
and why does it stop working all the time

the dhclient eth0 thing doesn't work anymore.
Any ideas?

share|improve this question
output of dmesg? – IanH Aug 24 '10 at 15:39
next time it happens I promise, but I can't predict that, any guesses ? – Asaf Aug 24 '10 at 15:50
guess what, happened again, dmesg – Asaf Aug 25 '10 at 15:13
up vote 1 down vote accepted

This is known bug with r8169 ethernet cards. For reference, it is bug #566389 on the Redhat bug tracker or #605045 on the Network-Manager Ubuntu bug tracker.

A current workaround is to place this in /etc/pm/sleep.d/85-network-r8169-module [1]

case $1 in
  hibernate | suspend)
    echo "Removing r8169."
    modprobe -r r8169
thaw | resume)
    echo 3 > /proc/sys/vm/drop_caches
    modprobe r8169
exit 0

However, it will make resuming a bit slower.


share|improve this answer
If it's NetworkManager bug, why not just switch to Wicd? – AndrejaKo Sep 5 '10 at 8:16
Ok so I'll just make a command that I'll run if it won't connect, what's the exact command I should run to make it work? modprobe -r r8169 and then modprobe r8169 ? – Asaf Sep 7 '10 at 19:59

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