Comment 4 for bug 1464365

Through a process of disk snapshotting, apt-mark holding certain packages, and bisecting the dist-upgrade, I've narrowed it down to one of the following packages. I'm unable to narrow it down any further. This is the output of `apt-get dist-upgrade --dry-run`

The following packages will be upgraded:
  xserver-common xserver-xorg-core xserver-xorg-video-ati
  xserver-xorg-video-intel xserver-xorg-video-nouveau
  xserver-xorg-video-radeon xserver-xorg-video-vmware xvfb
8 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Inst xserver-common [2:1.17.1-0ubuntu3] (2:1.17.1-0ubuntu4 Ubuntu:15.10/wily [all])
Inst xserver-xorg-core [2:1.17.1-0ubuntu3] (2:1.17.1-0ubuntu4 Ubuntu:15.10/wily [amd64])
Inst xserver-xorg-video-radeon [1:7.5.0-1ubuntu2] (1:7.5.0-1ubuntu3 Ubuntu:15.10/wily [amd64])
Inst xserver-xorg-video-ati [1:7.5.0-1ubuntu2] (1:7.5.0-1ubuntu3 Ubuntu:15.10/wily [amd64])
Inst xserver-xorg-video-intel [2:2.99.917-1~exp1ubuntu2.2] (2:2.99.917-1~exp1ubuntu3 Ubuntu:15.10/wily [amd64])
Inst xserver-xorg-video-nouveau [1:1.0.11-1ubuntu2build1] (1:1.0.11-1ubuntu3 Ubuntu:15.10/wily [amd64])
Inst xserver-xorg-video-vmware [1:13.1.0-0ubuntu1build1] (1:13.1.0-0ubuntu1build2 Ubuntu:15.10/wily [amd64])
Inst xvfb [2:1.17.1-0ubuntu3] (2:1.17.1-0ubuntu4 Ubuntu:15.10/wily [amd64])
Conf xserver-common (2:1.17.1-0ubuntu4 Ubuntu:15.10/wily [all])
Conf xserver-xorg-core (2:1.17.1-0ubuntu4 Ubuntu:15.10/wily [amd64])
Conf xserver-xorg-video-radeon (1:7.5.0-1ubuntu3 Ubuntu:15.10/wily [amd64])
Conf xserver-xorg-video-ati (1:7.5.0-1ubuntu3 Ubuntu:15.10/wily [amd64])
Conf xserver-xorg-video-intel (2:2.99.917-1~exp1ubuntu3 Ubuntu:15.10/wily [amd64])
Conf xserver-xorg-video-nouveau (1:1.0.11-1ubuntu3 Ubuntu:15.10/wily [amd64])
Conf xserver-xorg-video-vmware (1:13.1.0-0ubuntu1build2 Ubuntu:15.10/wily [amd64])
Conf xvfb (2:1.17.1-0ubuntu4 Ubuntu:15.10/wily [amd64])

The other bit of information I can give is that if I apt-mark unhold all of these except xserver-xorg-video-vmware, when I reboot I get a "low graphics" warning and get dumped into a text console. If I unhold them all, I get the screen occlusion as described above.