Sorry about the double post, but Datarock have been confirmed as support. Got an email from Bergen Live earlier this morning, times are:
Gates open: 6:00 p.m.
Datarock: 7:30 p.m. to 8:00 p.m.
Muse: 8:30 p.m. to 10:40 p.m.
Also a new seating/standing plan: