we have lots of dell workstations OptiPlex 980, 990, 9010. only on OptiPlex 990 wake on lan is working fine. on OptiPlex 980 and 9010 wake on lan is not working. we are using windows 7. we have applied the below solutions
updated bios to latest verion A14. also tested by applying A03.
updated network card driver intel 82578DM
setting in network card
setting in bios