Ubuntu
gnome-power-manager package

  1. Bug #673809
  2. Comment #4

Comment 4 for bug 673809

Revision history for this message
Wolfgang Kufner (wolfgangkufner) wrote : Re: Slow LAN network on battery mode

Could be the PCI Express powersaving (ASPM).
You could try switching it off with:
sudo touch /etc/pm/power.d/pcie_aspm
(see man pm-powersave)