Reported by Nikolaus Schaller, Dec 17, 2011
The problem is that the LCD is 640x480 while the TV is approx. 500x700. This requires two independent framebuffers which could be configured to be drivern by two different screens of the X-Server. Some hints: http://processors.wiki.ti.com/index.php/Dual_Frame_Buffer_on_OMAP35x
Comment 1 by Nikolaus Schaller, Oct 24, 2015
With omapdrm driver we still have a single framebuffer but it is shared and xrandr can be used to control which part is displayed on LCD and which on TV. So we can define them to show the same or to show different parts of the full screen. So we have a solution since 4.3-rc5.
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