Hi all update your driver for latest beta version 313.09 http://www.nvidia.co.uk/object/linux-display-ia32-313.09-driver-uk.html
Here is release notes:
Updated the NVIDIA X driver to reprobe displays when VT-switching to X, to allow reporting of hotplug events when displays are connected or disconnected while VT-switched away from X.
Added unofficial GLX protocol support (i.e for GLX indirect rendering) for the following extension and core commands.
OpenGL 3.0 commands ClearBufferfi, ClearBufferfv, ClearBufferiv, ClearBufferuiv and GetStringi.
Fixed a bug that caused the cursor shadow to be clipped to 32x32 pixels, even on Kepler GPUs that support a 256x256 cursor image.
Fixed a bug that prevented some cursor image updates from taking effect on displays with rotation or other transformations applied.
Fixed cursor alpha blending artifacts on displays with rotation or other transformations applied.
Added support for the GLX_EXT_buffer_age extension.
Improved the performance of glDrawPixels() by up to 450% when the pixel data is of type GL_BYTE.
Fixed libnvidia-encode.so library dependency by linking it with libnvcuvid.so.1 instead of libnvcuvid.so while creating it.
Improved performance of OpenGL framebuffer object binds with Xinerama enabled by 2000-3000% when the application's windows do not span screen boundaries.
Fix performance issues when using some versions of HyperMesh with Quadro GPUs.