Re: BenQ PE5120 and 854x480
How or where did you determine that your projector has a native resolution of 854x480?
Neither the EDID in the X log of your bug report, nor the official user's manual mention that resolution as being valid.
The EDID lists:
And the User's Manual lists:
SXGA, XGA, SVGA, VGA, Macintosh®, HDTV (1080i, 720p, 576p, 576i, 480p, 480i)