Feel free to bisect xserver-xorg-video-intel between 2.99.914..2.99.917 if it's fixed in 15.04 (which has .917). Only when something has been identified to fix something it'll be SRU'd.
I can't reproduce any of the issues with current utopic-proposed (or the equivalent lts backports), and I have the same GPU on my laptop.
Feel free to bisect xserver- xorg-video- intel between 2.99.914..2.99.917 if it's fixed in 15.04 (which has .917). Only when something has been identified to fix something it'll be SRU'd.
I can't reproduce any of the issues with current utopic-proposed (or the equivalent lts backports), and I have the same GPU on my laptop.