X11 breaks for Intel after ports update from r433396 -> r433935?

[Matthew D. Fuller]

On Mon, Feb 13, 2017 at 04:50:23AM -0800 I heard the voice of
David Wolfskill, and lo! it spake thus:
>
> Oh -- OK.  So... I removed /usr/local/etc/X11/xorg.conf, then tried to
> start X (via xdm, as I've done for years).  Here's the resulting
> Xorg.0.log:

'k, so not the LLVM issue.  I'd say the problem is around

> | [ 77486.077] (--) Using syscons driver with X support (version 2.0)
> | [ 77486.077] (--) using VT number 9
> |
> | [ 77486.230] (EE) open /dev/dri/card0: No such file or directory
> | [ 77486.230] (WW) Falling back to old probe method for modesetting
> | [ 77486.230] (EE) open /dev/dri/card0: No such file or directory

where it just can't connect to the DRI stuff.  Are you pre-loading the
KMS .ko?  UPDATING suggests that may be called for now:

    It is recommended to load the correct KMS driver (i915kms.ko or
    radeonkms.ko) via rc.conf, i.e. kld_list="i915kms.ko", to ensure
    correct functionality. Although the vendor drivers may attempt to
    load the correct drm driver, which does not always work, the
    modesetting driver assumes the required KMS driver is already
    loaded and will fail if there is none.


-- 
Matthew Fuller     (MF4839)   |  fullermd at over-yonder.net
Systems/Network Administrator |  http://www.over-yonder.net/~fullermd/
           On the Internet, nobody can hear you scream.