Unable to load i915kms

Hi,

I updated to r238858 yesterday, but I was unable to load i915kms (I
tried loading it manually and putting it in /boot/loader.conf). The
computer becomes unresponsive and the screen turns black in either case.
I'm using the GENERIC kernel with WITNESS and INVARIANTS disabled.

Output of pciconf -lvb:
vgapci1_at_pci0:0:2:0:	class=0x030000 card=0x15f21043 chip=0x01168086 rev=0x09 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = '2nd Generation Core Processor Family Integrated Graphics Controller'
    class      = display
    subclass   = VGA
    bar   [10] = type Memory, range 64, base 0xdd400000, size 4194304, enabled
    bar   [18] = type Prefetchable Memory, range 64, base 0xb0000000, size 268435456, enabled
    bar   [20] = type I/O Port, range 32, base 0xe000, size 64, enabled

Modules loaded at boot:
Id Refs Address            Size     Name
 1   38 0xffffffff80200000 12c57f0  kernel
 2    1 0xffffffff814c6000 70a8     acpi_video.ko
 3    1 0xffffffff814ce000 6568     cuse4bsd.ko
 4    1 0xffffffff81612000 cea0     geom_eli.ko
 5    1 0xffffffff8161f000 1abc1    crypto.ko
 6    1 0xffffffff8163a000 a4f9     zlib.ko
 7    1 0xffffffff81645000 15e2     fdescfs.ko
 8    1 0xffffffff81647000 3daf     linprocfs.ko
 9    1 0xffffffff8164b000 1eeb2    linux.ko
10    1 0xffffffff8166a000 2393     ums.ko
11    1 0xffffffff8166d000 17d3     uhid.ko
12    1 0xffffffff8166f000 a9f3     fuse.ko
13    1 0xffffffff8167a000 7019     i915.ko
14    1 0xffffffff81682000 111c4    drm.ko

I have WITH_KMS=YES and WITH_NEW_XORG=YES in /etc/make.conf. I also
rebuilt xorg-* and xf86-video-intel after updating to r238858.

Xorg previously worked on my laptop with all.14.3.patch on top of
-CURRENT from around mid-April, so I'm not sure what went wrong.

-- 
Denny Lin