Siobhán Hapaska's new sculptural installation, A Great Miracle Needs to Happen There (pictured), takes its form from the traditional Jewish nine-branched Hanukkah menorah candelabra. At Kerlin Gallery, Dublin, until 1 October 2011 Photograph: PR
Against the backdrop of inner-city riots and the formation of the BNP in the early 80s, the first offspring of black people who had moved to Britain in the 1950s and 60s were beginning to feel the need to make their cultural mark. Four black Britons – Eddie Chambers, Keith Piper (his Black Assassin Saints pictured), Donald Rodney and Marlene Smith – formed the Blk Art Group and changed the art scene once and for all. At Graves Art Gallery, Sheffield, until 4 February 2012 Photograph: PR
A show by six artists concerned with ambivalent attitudes to the retelling of accounts of suffering. Poshya Kakl's video work (pictured) records Iraqi women prisoners adorning the fences that constrain them with embroidery. At Golden Thread Gallery, Belfast, until 1 October 2011 Photograph: PR
Brush, by Angki Purbandono, part of Indonesian Eye: Fantasies & Realities, the Saatchi's latest survey of art from far-off climes, with Indonesian artists offering everything from Richter-esque pixelated, photo-realist paintings to creepy drawings that mix carnival grotesques with Manga cartoons. At Saatchi Gallery, London SW3, from 1 September until 9 October Photograph: PR
Marek Tobolewski's exhibition is titled Sym, with individual paintings and drawings going under names such as 2LC DipSym Neg and 1LC SymM+R (pictured). The titles may seem cryptic and inpenetrable, but the works themselves retain an enduring, enigmatic lure. At Tarpey Gallery, Castle Donington, Derby, until 24 September 2011 Photograph: PR
One of art photography's all-time greats, Friedlander's America By Car is a highpoint for his hybrid, visual poems. Every photo records the view from a hire-car window, with the steering wheel or dashboard providing a prosaic frame. At Timothy Taylor Gallery, London W1, from 1 September until 1 October 2011 Photograph: PR
Barlow has been making her gloriously messy paint and cement-smeared sculpture for more than four decades. Untitled: Broken Shelf 2 (pictured) is part of RIG, billed as her most ambitious exhibition yet. At Hauser & Wirth, Piccadilly, London W1, from 2 September until 22 October 2011 Photograph: Mike Bruce
Conceived by Up Projects and Glastonbury's Shangri-La, this touring lineup emphasises play, music and alternative highs. Dan Coopey's interactive lightbox (pictured), like a massive game of Connect Four with hundreds of customisable neon shapes, is one of several to be found at a secret Northamptonshire location, from 27-28 August Photograph: PR
