On Wed, Sep 24, 2014 at 06:58:57AM +0200, Harald Dunkel wrote:
> On 09/22/14 13:23, Jonathan Gray wrote:
> >
> > What video outputs does the machine have? Can you connect the display via
> > a different one? Given the invalid EDID warning in your dmesg you may want
> > to try a different display.
>
> It has a DVI and a HDMI socket. Of course I tried both (and a
> VGA adapter).
>
> The display is a Dell 2407WFP (1920x1200, made in 2007, only
> DVI and VGA). If I connect the DS437 to my TV via HDMI, then
> there is no screen output, either.
>
> I didn't notice the EDID message before. Unfortunately the
> dmesg.boot files are not saved and rotated, but on a reboot
> this morning the EDID message was gone.
Perhaps there is ghost crt output involved, could you
try the following patch?
Index: sys/dev/pci/drm/i915/intel_crt.c
===================================================================
RCS file: /cvs/src/sys/dev/pci/drm/i915/intel_crt.c,v
retrieving revision 1.9
diff -u -p -r1.9 intel_crt.c
--- sys/dev/pci/drm/i915/intel_crt.c 3 May 2014 05:22:38 -0000 1.9
+++ sys/dev/pci/drm/i915/intel_crt.c 24 Sep 2014 05:44:10 -0000
@@ -746,6 +746,7 @@ void intel_crt_init(struct drm_device *d
struct intel_crt *crt;
struct intel_connector *intel_connector;
struct drm_i915_private *dev_priv = dev->dev_private;
+return;
/* Skip machines without VGA that falsely report hotplug events */
if (dmi_check_system(intel_no_crt))
