Strange Lag in Scene viewport

Hello there, im having a really strange problem: Mouse movent and navigation on the scene view windows has a delay i had never have, its unresponsive, as if you would have a scene with a lot of objects, lag.

The thing is that, if I hit play, and go back to the scene view while the game is still running it works perfect, zero lag. Stop the game, navigate (right click + WASD, pan, rotate camera etc) and you get this (not so long) delay.

If you draw a selection box the actual blue box doesnt follow the cursor, but arrives a little too late.
If you tap any WASD while right clicking it will move a little too late.
And so on.

If I have the game running and try the same things it works really great.
I have a decent rig and a good videocard, so I don’t think i have hardware problem. Have the latest NVIDIA drivers (BETA).

A little video (sorry for quality) but you can easily see what i mean.

I have been installing Unity over the last years and never had this problem.

Any suggestion?

Thanks!!

I have similar issue, happening only when I switch full screen on scene viewport with something like 60k vertices in scene, mouse navigation lag.

Curiously it happens only on my windows laptop ( which is ok in term of perf, i can use zbrush, modo with it without any issue for similar vertex count ), but it doesn’t happens on my macbook pro ( 2011).

I did not try on unity4 by the way see if i get same behavior.

Well I installed newest beta drivers from nvidia, and the problem dissapeared. 306.23.

Hope it helps.

It does the same thing on my Nvidia GPU.
If I switch to the Intel HD, it is fine.