We have not had any problems with those systems. We use Creston QuickMedia in all our new upgrades. This device takes care of the problem for sure. We have always used the better Extron interfaces to be really sure of the signal path. Some of the laptops we have seen have become very picky about what they like. Your Smart View vs-811 does not pass pin 9 information. i remmeber this being an issue back in the old days, but just assumed that it was not a problem anymore.ĭo you guys think that moving to vga over cat5 would solve this in a more general manner for "most" scenarios? I DID NOT however, test by having the cable connected while booting up the machine, i had totally forgotten that this could cause a problem.
BOTH tests, the computer detected the display (it actually showed the name/model of the display in the control panel) and worked as expected.
the longer cable seems to have all pins, but i'm not sure how to tell whether its connected internally or not? is there a test i can perform to confirm this?Īlso, with the short cables, i tried with 2 short cables, one with all pins, the other with pin 9 missing. No DDC/EDID = laptop doesn't have info that tells it what res are supported by projector = generic safe res output.
This capability is especially important when a PC is initially booting up or when a mobile PC user enables the external video port, so that the PC can properly detect the type of display attached. +5V is needed as a power source for the DDC and EDID circuits of a display monitor when the host is attempting to read the monitor's EDID data and the monitor's own local power supply is not yet turned on. Sorry if these are newb questions, but i am genuinely curious as some of the problems above seem counter-intuitive to me. i'm thinking of using VGA signal booster connected to the laptops, will this fix the problem?
This throws me off a bit as it hints that it may be a software issue? graphics driver issue?Ĥ. Logging into OS X, actually allows the projector to work. one of the laptops that doesnt work is actually a MacBook Pro. are there different variants of a "vga" signal? like DVI? which may be causing the differences?ģ. Why do some laptops work and others dont? Is it differing tolerances on the PC video card or the projector hardware? or both?Ģ.
So it seems that its just the cable length that is the problem. In windows, the projector is correctly identified as: "Dell 1400X" etc. If I use a shorter (2m) VGA cable as a test to connect directly from the laptops to the projector, all computers work as expected. as if it doesnt properly know what type of device its connected to. On windows, it can see that "something" is connected.but identifies it as "generic vga". the projector doesnt seem to receive a valid signal from the laptops. it sends its signal correctly to the projector and all is good.
My problem is that with some laptops, connecting the cable works as expected, ie.
We've installed a ceiling projector and the VGA cable used spans approx 10m - 15m (waiting on the installer to give me an exact length). I've got a wierd problem and i ** think ** i know what the problem is, but would also like some clarification on other points.