Packers linebacker Erik Walden has been suspended by the National Football League for one game, the regular season opener, after violating the league's personal conduct policy.  Walden pleaded no contest to a misdemeanor charge of disorderly conduct following a domestic violence incident with his girlfriend last November.   The charge will be dropped in Walden avoids another incident in the next year and he completes 50 hours of community service.   It's the third suspension facing a Green Bay player heading into the 2012 season.   Mike Neal will miss four games for violating the league's substance abuse policy while Anthony Hargrove received an eight game suspension for his role in the bounty gate case while he was a member of the New Orleans Saints.