https://bugs.freedesktop.org/show_bug.cgi?id=17902
--- Comment #65 from Daniel Vetter daniel@ffwll.ch 2012-04-16 11:24:43 PDT --- You need to check where the dvo chip actually is, i915 has about 6 different i2c channels. The easiest way is to use one of the i2c-tools to detect chips on all the i2c buses that drm/i915 exposes.