[Intel-gfx] Trying to enable ZaphodHeads, "no screens found"

[Chris Wilson]

On Sun, Nov 09, 2014 at 12:43:07PM -0600, Nate Bargmann wrote:
> I hope this isn't an FAQ.
> 
> I am trying to configure a newly acquired Lenovo ThinkCentre M73 which
> has the onboard Intel HD4600 video controller with DisplayPort and VGA
> outputs.  Each output works independently and in combination as an
> extended desktop via RandR.  However, on the box this one will replace I
> have a dual-port Radeon controller that is configured for ZaphodHeads
> and I use Xfce for an independent desktop on each monitor.  I've adapted
> to this work flow and was encouraged by reading of fairly recent support
> for ZaphodHeads in the Intel driver. I am running Debian Unstable which
> currently has the Intel driver version 2.21.15.
> 
> I have tried several configurations from the one I found in the archives
> from Chris Wilson:
> 
> http://lists.freedesktop.org/archives/intel-gfx/2014-April/044115.html
> 
> to a modified version of xorg.conf from my working Radeon system.  In
> each case the X server aborts and the log file rather clearly states
> "no screens found" when I do have screens defined in xorg.conf.  At the
> moment I am at a loss as repeated searching has turned up no other
> clues.  Have I hit a bug?  What is the most effective way to
> troubleshoot this as I've had good success with Xorg for years?  I have
> attached the latest xorg.conf and the resulting log file as well as the
> output from 'xrandr -q'.

You do need to use SNA to enable ZaphodHeads support, and to be sure
grab xserver-xorg-video-intel from experimental.
-Chris


-- 
Chris Wilson, Intel Open Source Technology Centre