Comment 20 for bug 392039

I just wanted to reiterate the workaround (via blacklisting) as I had in a duplicate bug -
Workaround by blacklisting:
Create a file (with your favorite plain-text editor, and root permissions) in /etc/modprobe.d/. Call it blacklist-intel.conf and copy/paste the following two lines:
blacklist i915
blacklist intel_agp

Now, run:
sudo update-initramfs -u

A restart is necessary for the change to take effect.