i be use this projector in a linux -lrb- ubuntu -rrb- system . the quality of the image be perfect ... it be easy to set up -lrb- in fact , there be not necesary to do anything at all , just to plug it on -rrb- . the image size be always the same , it just depend of the projection distance . but the image resolution depend of the connection wire -lrb- if a s-video the max resolution be 800x600 , if VGA the resolution grow up to 1920x1200 ... -rrb- and the graphic card . i be project the movie to a white wall , and have a image size about 1.80 m diag with 3m distance between wall and projector . it be not necessary to turn off all the ligth because the high contrast ratio , but it be better if there be not a lot clarity in the room .