I really don't know where to look for help with this problem, so I'm starting here.
I am running a clean install of 12.10, on Gigabyte z68a-dh3-b3 mobo, Core i5 2500K, integrated Intel HD 3000 (Sandy Bridge). Dual Monitor setup; Samsung (1440x900) on DVI and Acer (HD 1080p) on HDMI.
Whenever the HDMI output is "active", i.e. Acer screen configured "On" in Display Settings, my wireless keyboard and mouse are very unresponsive - characters dropped while typing, and mouse super slow. When I configure the Acer screen "Off", everything immediately returns to normal.
The questions I have are is this an Intel Graphics driver issue ? A USB issue ? An Xorg issue ? Just don't know where to start.