you're not alone, I've had the same issue with ubiboot too. tried a few different harmattan based kernels, all with the same issue. Black screen, but I haven't got around to getting debug logs yet, havent had the time. HW revision 1501 In the meantime, reflash the standard open kernel if you need to get back into harmattan. sudo flasher -a <yourmainfirmware.bin> -k zImage_2.6.32.54-openmode_l2fix --flash-only=kernel -f -R