Comment 31 for bug 925350

It's odd that this commit would be identified as the culprit, unless you're supplying some value to the i915.lvds_use_ssc module parameter. This commit changes the meaning of this parameter from "use SSC if the bios says we should" to "force the use of SSC no matter what the bios says."

What's the output of running 'sudo cat /sys/module/i915/parameters/lvds_use_ssc'? If it's anything other than -1, remove whatever you did to set the parameter and see if it fixes the problem (this would be found either in /etc/default/grub or in a file in the /etc/modprobe.d directory).