Comment 26 for bug 1432843

Note here https://bugs.launchpad.net/ubuntu-cdimage/+bug/1441843 that /usr/lib/xorg/modules/drivers is missing most of its drivers due to the fact that most, if not all, of the xserver-xorg-video-* packages are missing. My guess is that this is the problem: they're not in the manifest! Compare http://cdimage.ubuntu.com/lubuntu/releases/15.04/beta-1/lubuntu-15.04-beta1-desktop-amd64.manifest with http://cdimage.ubuntu.com/lubuntu/releases/15.04/beta-2/lubuntu-15.04-beta2-desktop-amd64.manifest. Interesting that this works for anyone!