(In reply to comment #0) > I've switched from openSUSE's 3.4.47 to drm-next-3.13-wip and noticed > problems with colors. Gradients are not smooth, it looks like the GPU is > working in some limited color depth (lower than 24b). I suspect you are seeing a problem with these patches: http://cgit.freedesktop.org/~agd5f/linux/commit/?h=drm-next-3.13-wip&id=f35533d0d943b0dc31e1e16c0704959c6411f890 http://cgit.freedesktop.org/~agd5f/linux/commit/?h=drm-next-3.13-wip&id=a7986a436b7234368aa03e9e06ad737c9e9e42c5 You might try enabling dithering via xrandr.