If there's one electronic sub-genre that is not worth approaching blind it's “tech-house”. Since the late Nineties, it has tended to be the most functional and generic of club soundtracks, a steady, decadent plod, all clean lines and predictable shifts: nothing to frighten the horses or interrupt the steady progress of weekend hedonism. In short, boring.

Never knowingly under-mythologised, U2 have chosen to mark the 20th anniversary of their album Achtung Baby with this sizeable documentary about the making of the record and the traumatic soul-searching that went into it. It dovetails neatly with the forthcoming reissue of the album itself, which will be available as a mere single CD, as well as in a vinyl box set and an "Über Deluxe" edition crammed with CDs, DVDs, luxurious art prints etc.

Street art – or graffiti to give the old-money name by which many still know it – gets people going. Worthless or priceless? Criminal or cultural? Earlier this week theartsdesk carried a review of the Channel 4 documentary Graffiti Wars about the street rivalry between Banksy and Robbo. Rarely has a television review prompted so many readers to write in and comment on the site. But whichever way you slice it, it’s a vagabond art form whose practitioners are used to dodging the law and shrouding their ID behind a nom de guerre. This new set of photographs captures something of the danger and the clandestine thrill associated with street art and graffiti.

Street art – or graffiti to give the old-money name by which many still know it – gets people going. Worthless or priceless? Criminal or cultural? Earlier this week theartsdesk carried a review of the Channel 4 documentary Graffiti Wars about the street rivalry between Banksy and Robbo. Rarely has a television review prompted so many readers to write in and comment on the site. But whichever way you slice it, it’s a vagabond art form whose practitioners are used to dodging the law and shrouding their ID behind a nom de guerre. This new set of photographs captures something of the danger and the clandestine thrill associated with street art and graffiti.

Photography isn’t looking, it’s feeling. If you can’t feel what you’re looking at, then you’re never going to get others to feel anything when they look at your pictures. Thus Don McCullin, quoted on the information board of a new display at Tate Britain of around 50 black-and-white silver gelatin photographs, chosen and printed by the artist himself. No digital here, the process of the darkroom is under his control.

In 1981, when I last came to Bayreuth, the festival still seemed to be a battleground between the German Left and Right, between the blame faction and the guilt faction, between the commie East and the fat-cat West. Plus ça change. Without quite openly taking sides, Sebastian Baumgarten’s new staging of Tannhäuser rings some cracked old political bells while, apparently with Bayreuth’s connivance, candidly parodying most of the thinking that underpins this admittedly somewhat raw, yet for Wagner absolutely crucial early work.

Asghar Farhadi’s new film unostentatiously suggests that Iran has many of the same things we have: cars, cash machines, schools, sex, divorce, Alzheimer’s. It doesn’t, we gather, have modern law. Before howls of protest erupt over so banal and Western-slanted a generalisation, I stress that this is the film’s contention: the madness of law the film proposes is not necessarily fact.

Frank is a primary school teacher in Berlin. His pupils love him as he treats them as individuals rather than little pegs for fitting into holes. What they don’t know - and what Frank doesn’t advertise - is that he is gay. Their dictation homework is marked in the cubicle of a public toilet while Frank sits waiting to see what’ll pop through a glory hole. Taxi Zum Klo is explicit – extremely so – but it’s also a deadpan, matter-of-fact depiction of a carefree lifestyle. The subject of bans, seizures and cuts in the early Eighties, this is its first release on DVD. It’s also uncut.

The video for W’s opening cut “Doorway” is unforgettable. Janine Rostron – who is Planningtorock – is seen face on. The music is tense, yet sepulchral. The voice is treated, neither male nor female. With her prosthetic nose, she looks alien but not cutely so. It’s disturbing, a bad-dream version of what Cindy Sherman might film to soundtrack the song.

We’re talking in Berlin for two reasons: Andrew Litton has just renewed his contract with the Bergen Philharmonic – he’ll see out at least 12 years as the Norwegian orchestra’s principal conductor – and they’ve now reached the holiest of holies on their European tour, the Philharmonie. The long-term relationship is rare enough, given the musical chairs of today’s higher-paid international conductors, though not unique. Yet it seems to me that what they have together probably is - and I can say, hand on heart, that the Bergen/Litton Berlin concert knocked spots off the one time I heard the Berlin Philharmoniker and Rattle play in their fabulous home.

If ever there’s a film where the landscape itself seems to become a main character, it’s Alexei Popogrebsky’s How I Ended This Summer. Action, such as it is, unfolds in the remotest Arctic regions of Russia’s Far East, where the personal conflict between the film’s two protagonists develops as they come to understand the nature of their different conflicts with the looming mountains and rough seascapes by which they are isolated.