dual monitors not working

richcs815 · #1 March 12th, 2005, 05:36 PM

I have a G3 b&w 450mhz running jaguar. My radeon card has three outputs on it (vga, dvi, and s-vid). It WILL do simulscan with the video mirrored on a monitor and TV. But when I hook up another vga to the dvi port using an adapter, it only shows the same thing on both monitors. (I don't have a TV hooked up)

In the 'displays' panel of the system pref's I have no option for 2 monitors.

Is my radeon retarded or is it software or what.

How can I check the card to see if it's capable of dual?

My fear is that I will buy another card, then find out that my MAC (unlikely) cannot run dual displays.

thank you, richard S.

Go3iverson · #2 March 15th, 2005, 06:19 PM

It really should be the GPU handling the dual displays, so the machine itself shouldn't matter all that much. Have you hit the detect displays button? It may not show up unless you tell it to look.

richcs815 · #3 March 15th, 2005, 09:23 PM

Thank you. When I first hooked up the second monitor the machine added it's name to the monitor list and both monitors had the same picture on them. Then, after I fiddled with it a while, it reset for the one I had all along.

Then I went looking for the second screen option and couldn't find it, and when I tried the search for monitors (or whatever it's called) it didn't acknowledge the other one.

If I hook them both up it only sends one picture and it appears on both, and the one in the regular vga plug seems to be a little dim. (only when their both hooked up, as soon as I disconnect the 2nd one the other brightens up.)

Is there such a thing as a radeon card with three ports that can't do duel displays? If so, how can I check the spec's or rom or whatever I need to know to identify the card?

thanx, richard s.

texanpenguin · #4 March 15th, 2005, 10:16 PM

Go to the Display System Preference pane, click Arrangement, and make sure "Mirror Displays" is unchecked.

richcs815 · #5 March 16th, 2005, 03:25 AM

There doesn't seem to be any options for arrangement or mirror. Unless there is another preference panel I don't know about.

richard S.

**btoneill** · #6 March 16th, 2005, 09:10 PM

there is such a thing as a radeon that doesn't support two heads. Just because it has all the connectors doesn't mean it can do non-mirrored.

Brian