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This is a strange Universal Benny Rubin short, released October 14, 1929, directed by Walter Fabian, it does feature Benny and Otto Lederer as Father and Son, but the vaudeville headliners listed in the imd(um)b are portrayed by other actors, that certainly isn't Bill "Bojangles" Robinson appearing in this short, and, after you see Benny do the famous stairs dance, you can tell he's no Bill Robinson either:

https://www.youtube.com/watch?v=RW58FKPvPOI

RICHARD M ROBERTS