xserver without DDX video driver.

kumar vemuri kumar210in at gmail.com
Thu Mar 17 06:44:27 PDT 2011

Hi All,

     Have just started looking into the xserver code and is a spare time
project of mine. Would be great if someone can answer the following
basic questions.    

     The DDX video driver module loaded into the xserver talks to the
DRM for its functionality. 

a. What happens when the video driver is not available? Am guessing that
the xserver will fallback to a s/w mode in the absence of 2D
acceleration/2D driver (GPU). If this is true, can someone point me to
the source code in xserver of this s/w fallback routines/functions.

b. Also, does this s/w fallback part talk to the DRM (just like the 2D
driver does)?


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