India, April 18 -- Legend has it that folk torchbearer and lifelong pacifist Pete Seeger considered taking an axe to the power cables when Bob Dylan went electric at the Newport Folk Festival in July 1965. This juicy piece of Dylan lore, worthy of a folk song of its own, earns a playful nod in James Mangold's film A Complete Unknown. Seeger, played by Edward Norton like the 1960s folk scene's Mr Rogers, is rattled by the amplified rock 'n' roll served up by Dylan, cosplayed by Timothee Chalamet with tousled hair and a leather jacket. The audience erupting into a chorus of boos leaves Seeger running around in a fluster backstage. He first urges the sound mixers to turn down the volume. When refused, he attempts to wrest the soundboard from...