From: Rob Bell (rbell1_at_csc.com)
Date: Thu Apr 01 1999 - 21:58:54 EST
I can understand your situation and I sympathize with you. I know there
are many cases where doing a presentation works best while having both
the LCD and the projector turned on.
However, the situation you describe isn't a bug/glitch. The reason the
system behaves that way is a physical design constraint of LCD screens
and the laptop's video subsystem. The LCD has a fixed resolution and
therefore all of the pixels must be driven, even if the outer edge of
the screen appears blank while displaying a resolution lower than the
maximum. Since the video subsystem can't output two different
resolutions and you are (by your selection of both LCD and video out)
forcing the system to use the LCD's resolution, the video out gets that
resolution. When video out is the only thing being driven, the video
subsystem drives it at accurately at the selected resolution.
I guess for people using their laptops with external projectors
regularly, matching the resolution of the laptop's LCD with the
projector's is an important purchasing consideration.
Sorry this isn't much help, but hopefully it explains things...
HTH,
Rob
This archive was generated by hypermail 2.1.3 : Thu Jan 23 2003 - 09:54:52 EST