Comment 4 for bug 1300723

That issue is only seen with that kernel; which is the one released with Trusty. I've not seen that problem with the previous kernels; but i even does not know if its related to the kernel or an other package (as i've not found a related post/comment on the net).

So i am not gooing to install a vanilla kernel which also require some newer packages like mesa for example. Still stay on pure LTS.