how to roll back intel video driver

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I have a Dell XPS 15 (l502x). It's an optimus machine.

Last night I updated the intel drivers with the 'Intel Graphics Installer for Linux'. Now my machine crashes back to gdm login when I try to play a video in VLC.

How can I find out what the previous driver was and return to it?

The installer adds a repository. So I thought of removing all packages from that repository but it with dependencies that would require removing 735 (!) packages.

The following packages are currently installed from the intellinuxgraphics repo:

cairo.x86_64                          1.14.4-23.intel20154         @intellinuxgraphics
cairo-devel.x86_64                    1.14.4-23.intel20154         @intellinuxgraphics
cairo-gobject.i686                    1.14.4-23.intel20154         @intellinuxgraphics
cairo-gobject.x86_64                  1.14.4-23.intel20154         @intellinuxgraphics
cairo-gobject-devel.x86_64            1.14.4-23.intel20154         @intellinuxgraphics
intel-gpu-tools.x86_64                2.99.917-23.intel20154       @intellinuxgraphics
intel-linux-graphics-installer.x86_64 1.4.0-23.intel20154          @intellinuxgraphics
libva-intel-driver.x86_64             1.6.2-23.intel20154          @intellinuxgraphics
xorg-x11-drv-intel.x86_64             2.99.917-23.intel20154       @intellinuxgraphics

I guess if I can install them from another repo and allow overwriting that should work right? However I can't find them in the *fedora repo.

Any help much appreciated.