Comment 32 for bug 510615

I've found the following msg about NX and I've enabled it.
Maybe this is the reason why network card hanged previously?

Linux exodo4 2.6.32-22-generic #33-Ubuntu SMP Wed Apr 28 13:27:30 UTC 2010 i686 GNU/Linux
Ubuntu 10.04 LTS

Welcome to Ubuntu!
 * Documentation: https://help.ubuntu.com/

Your CPU appears to be lacking expected security protections.
Please check your BIOS settings, or for more information, run:
  /usr/bin/check-bios-nx --verbose

0 packages can be updated.
0 updates are security updates.

/usr/bin/X11/xauth: creating new authority file /home/usuario/.Xauthority
usuario@exodo4:~$ /usr/bin/check-bios-nx --verbose
This CPU is family 6, model 14, and has NX capabilities but is unable to
use these protective features because the BIOS is configured to disable
the capability. Please enable this in your BIOS. For more details, see:
https://wiki.ubuntu.com/Security/CPUFeatures
usuario@exodo4:~$