[Intel-gfx] DELL Latitude e5540 Intel 4400 3rd display problem

[Jani Nikula]

On Mon, 02 Feb 2015, Gergely Nógrádi <gergely.nogradi at idata.hu> wrote:
> I can't configure the 2nd or 3rd display on my Dell Latitude e5540
> notebook and Dell NB Port Replicator.
> I tried to connect DVI, DP and VGA to Port Replicator and it is
> working only in mirror mode.
> The only way to use 2 external display if I connect the DVI or DP to
> Port Replicator and HDMI to notebook.
> I send the logs and system environment.

The replicator probably needs DP MST support. Please try a newer kernel,
say v3.18 or v3.19-rc7, and see what happens. Attach dmesg with
drm.debug=14 module parameter set, running the new kernel.

BR,
Jani.


-- 
Jani Nikula, Intel Open Source Technology Center