Bug#658662: drm/i915: no signal via DisplayPort on Sandy Bridge since Linux 3.2

[Jonathan Nieder <jrnieder@gmail.com>]

tags 658662 + patch fixed-upstream
quit

Hi,

Peter Colberg wrote:

> Since upgrading to linux-image-3.2.0-1-amd64, an external display
> connected via DisplayPort to a Sandy Bridge onboard graphics card
> stopped working, and instead turns off reporting “DP no signal”.
>
> With linux-image-3.1.0-1-amd64, the same display connected via the
> DisplayPort works fine.

Thanks again.  This is said to be fixed by the patch "drm/i915:
properly compute dp dithering for user-created modes" (2012-04-10)
which has been queued for 3.2.16.