Ok a couple of things I have found out....
Firstly this is not just 1 PC - I have an my new i5 / nvidia 450gts and
and older amd x2 4600/nvidia 8500 - completely different motherboard
types, etc - same issues.
gnome-session-fallback - gives the exact same issues. (unless I disable
compiz effects) so its a Compiz issue by the looks of things...
Workaround #1: OpenGL > Sync To Vblank = off :-
- This worked to solve the rectangle issue !
- however performance was still really really terrible,
- its odd, it registers the same fps as when you disable compiz however its
really jerky, unresponsive and totally not acceptable
- its the same with pretty much all fullscreen games under compiz on my 450gts
is like watching a geforce FX...
- if compiz is disabled (i.e gnome-fallback / no effects) its normal, the
difference is obvious, its almost like having a GPU upgrade in comparison.
Workaround #2: Force full screen redraws (buffer swap) on repaint
- Sorry couldn't find that option...
However if I enable
composite -> "unredirect fullscreen windows" it fixes ALL performance
issues - regardless of the ' Sync To Vblank' setting ... It's the same
speed as kde (with /without desktop effects), xfce, lxde, etc
So for anyone having any speed, rendering issues with unity it is worth
trying to enable that option.
** Also affects: compiz
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1012401
Title:
unity (3D) + Nvidia has rendering issues with Unigine heaven benchmark
- Unity 2D is fine as are all other DE's (kde,xfce,etc)
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