newest drivers lose X-video support?

[Brandon Kuczenski]

Hello,

I recently installed updated versions of xserver-xorg-video-intel 
(2.5.1-1ubuntu5), libdrm2 and libdrm-intel1 (2.4.1-0ubuntu7) in order to 
try to resolve a suspend-to-RAM bug.  I installed files from this 
archive:
https://edge.launchpad.net/~intel-gfx-testing/+archive

The fix appears to have worked, but an apparent side-effect is that I have 
lost X-video support.  xvinfo returns:
$ xvinfo
X-Video Extension version 2.2
screen #0
  no adaptors present
$

The XVideo extension is still being loaded:
$ grep -i xvideo /var/log/Xorg.0.log
(II) Loading extension XVideo
(II) Loading extension XVideo-MotionCompensation
$

I'm pretty sure it used to work because mplayer, which ran fine before 
the upgrade, no longer functions with hardware acceleration; I have to 
fall back to unaccelerated video output.  The chipset is a Mobile Intel 
GM45 [hardware is a Lenovo x200].

Any idea how I can resolve this problem?

Thanks in advance,
Brandon