What about Minnesota, Oregon and Wisconsin?
No, you definitely require both chambers of the General Assembly in Pennsylvania. Jubelirer of Vieth v Jubelirer fame (the SCOTUS case on the PA gerrymander) was a state senator BTW.
Minnesota, Wisconsin, and Oregon also require both chambers to approve a congressional redistricting. Oh, and to reiterate, Governor Pawlenty of Minnesota is still a Republican, and must sign off on any redistricting, and there is no chance the Oregon Dems could redistrict their lone Republican congress critter, Greg Walden (OR-04), out of office.