I got a new PC with an i5-4570 that has an HD4600 integrated graphics card. (It also came with a discrete Radeon 7670 card which I disabled in the BIOS because it seem it is easier to get along with Intel drivers these days ??).
I did a fresh install but some unity animations are slow and stutter. For example Alt+Tab switching or Super+s window spread animation etc..
It seems everything is set up correctly but these stuttering animations are kind of annoying. Here are some outputs :
~$ /usr/lib/nux/unity_support_test -p OpenGL vendor string: Intel Open Source Technology Center OpenGL renderer string: Mesa DRI Intel(R) Haswell Desktop OpenGL version string: 3.0 Mesa 9.2.1 Not software rendered: yes Not blacklisted: yes GLX fbconfig: yes GLX texture from pixmap: yes GL npot or rect textures: yes GL vertex program: yes GL fragment program: yes GL vertex buffer object: yes GL framebuffer object: yes GL version is 1.4+: yes Unity 3D supported: yes ~$ glxgears Running synchronized to the vertical refresh. The framerate should be approximately the same as the monitor refresh rate. 303 frames in 5.0 seconds = 60.546 FPS 301 frames in 5.0 seconds = 60.033 FPS 301 frames in 5.0 seconds = 60.033 FPS