Comment 14 for bug 573259

I have the same problem under 10.10, kernel 2.6.35-22.34.
There seems to be some bad interaction between Windows and Linux (my lan chip is sometimes asleep under linux, then also under windows. Cold boot makes everythink ok again).

Installing the r8168 driver from realtek (unknown LICENCE)

http://www.realtek.com.tw/DOWNLOADS/DOWNLOADSVIEW.ASPX?LANGID=1&PNID=13&PFID=5&LEVEL=5&CONN=4&DOWNTYPEID=3&GETDOWN=FALSE

solves (for now...) the issue:

1) compile and install it as root (using the provided autorun.sh script)
2) blacklist 8169 by: cat blacklist r8169 > /etc/modprobe.d/blacklist-network.conf
3) update the initramfs: update-initramfs -u

reboot... it apparently works