r297297 Haswell, libGL error: failed to open drm device, driver i965

[Anton Shterenlikht]

This is an amd64 laptop with 11.0-CURRENT #0 r297297.
pciconf -lv gives:

vgapci0 at pci0:0:2:0:     class=0x030000 card=0x061f1028 chip=0x0a168086 rev=0x0b hdr=0x00
    vendor     = 'Intel Corporation'
    device     = 'Haswell-ULT Integrated Graphics Controller'
    class      = display
    subclass   = VGA

Am I right that I need x11-drivers/xf86-video-intel for it?

Xorg.log doesn't show any errors:

http://eis.bris.ac.uk/~mexas/logs/Xorg.0.log

On launching firefox I get:

libGL error: failed to open drm device: Permission denied
libGL error: failed to load driver: i965

Is this supposed to work?
Have I forgotten some setup step?

Also, will this driver support a single
logical screen made of two monitors,
i.e. laptop's + HDMI attached?

Many thanks

Anton