I am following up on my question regarding missing i915 module.
On my Dell XPS 13 (9350), if I enable the graphics acceleration in VLC (overlay), I cannot resize the video at all, it stays at native size of 1:1 whatever I do (changing window size, full screen, changing zoom etc.). The contextual menu also appear below the video instead of above (so not visible).
I think it is not a VLC issue as I have seen similar behaviours in other programs too.
I am using the released kernel 4.4 on Ubuntu 15.10.
I have installed the Intel driver from here and a missing module from here. And then I have enabled the Intel driver in the "software source" GUI and rebooted.
Thanks,