After updating from 13.04 to 13.10 many of 3D unity stuff has stopped working,

I am suing Samsung Series 3 (NP350V5X) Laptop which has Switchable Intel and AMD Radeon HD 7670M GFX.

1. xserver-xorg-video-ati does works but NO 3D support and graphics are very low. [I am currently using this]
2. fglrx & fglrx-updates shows blank screen after Login.
3. Intel Graphic Install doesn't work either (dependency error)

Output of $ sudo lshw -c video

  *-display               
       description: VGA compatible controller
       product: Thames [Radeon HD 7500M/7600M Series]
       vendor: Advanced Micro Devices, Inc. [AMD/ATI]
       physical id: 0
       bus info: pci@0000:01:00.0
       version: 00
       width: 64 bits
       clock: 33MHz
       capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
       configuration: driver=radeon latency=0
       resources: irq:45 memory:e0000000-efffffff memory:c0120000-c013ffff ioport:3000(size=256) memory:c0100000-c011ffff
  *-display
       description: VGA compatible controller
       product: 3rd Gen Core processor Graphics Controller
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 09
       width: 64 bits
       clock: 33MHz
       capabilities: msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: irq:46 memory:bfc00000-bfffffff memory:d0000000-dfffffff ioport:4000(size=64)

Similarly $ /usr/lib/nux/unity_support_test -p

OpenGL vendor string:   VMware, Inc.
OpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 3.3, 256 bits)
OpenGL version string:  2.1 Mesa 9.2.1


Not software rendered:    no
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:       no

Shows no 3D support.

Can anyone please guide how to make things working again.