Hello,
I have the following problem/question and will be very happy, if someone can help to clear this up.

Short sys info:

Dell Vostro Laptop
Ubuntu 11.10 32bit with Unity3D
AMD Radeon 6630M
Switchable integrated Intel graphics

And my problem:
I've spent several nights trying to get rid off the horizontal video tearing, that often comes with FGLRX drivers, without any success. This made me switch back from AMD's proprietary FGLRX driver to the open source Mesa.
Since my laptop has switchable graphics I am now wondering if the AMD card is being used at all.

Here is what I get when I type "xvinfo" in the terminal:

Code:
$ xvinfo
X-Video Extension version 2.2
screen #0
  Adaptor #0: "Intel(R) Textured Video"
    number of ports: 16
    port base: 77
    operations supported: PutImage 
    supported visuals:
      depth 24, visualID 0x21
    number of attributes: 3
      "XV_BRIGHTNESS" (range -128 to 127)
              client settable attribute
              client gettable attribute (current value is -1)
      "XV_CONTRAST" (range 0 to 255)
              client settable attribute
              client gettable attribute (current value is 127)
      "XV_SYNC_TO_VBLANK" (range -1 to 1)
              client settable attribute
              client gettable attribute (current value is 1)
    maximum XvImage size: 2048 x 2048
    Number of image formats: 5
      id: 0x32595559 (YUY2)
        guid: 59555932-0000-0010-8000-00aa00389b71
        bits per pixel: 16
        number of planes: 1
        type: YUV (packed)
      id: 0x32315659 (YV12)
        guid: 59563132-0000-0010-8000-00aa00389b71
        bits per pixel: 12
        number of planes: 3
        type: YUV (planar)
      id: 0x30323449 (I420)
        guid: 49343230-0000-0010-8000-00aa00389b71
        bits per pixel: 12
        number of planes: 3
        type: YUV (planar)
      id: 0x59565955 (UYVY)
        guid: 55595659-0000-0010-8000-00aa00389b71
        bits per pixel: 16
        number of planes: 1
        type: YUV (packed)
      id: 0x434d5658 (XVMC)
        guid: 58564d43-0000-0010-8000-00aa00389b71
        bits per pixel: 12
        number of planes: 3
        type: YUV (planar)
and "glxinfo | grep OpenGL"
Code:
~$ glxinfo | grep OpenGL
OpenGL vendor string: Tungsten Graphics, Inc
OpenGL renderer string: Mesa DRI Intel(R) Sandybridge Mobile x86/MMX/SSE2
OpenGL version string: 2.1 Mesa 7.11
OpenGL shading language version string: 1.20
OpenGL extensions:
Nowhere an AMD/ATI card is mentioned. Does it mean that I'm running the system only on the integrated Intel card?

And thoughts will be appreciated!


Thanks,
Christo