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From: William R. Walsh on 8 Apr 2010 15:18
Hi!

> Thanks for the information. I guess I figured it would be possible to
> run both displays at different resolutions. Guess the only way to do
> that is with a different type of video card.

If that's what you want to do, it's entirely possible. (But that's
what you should have asked for! :-))

Dell's permutation of the nVidia drivers usually has this feature
disabled. If you want to use it (or a number of other features) you
may want to take a look at LaptopVideo2Go. They have driver packages
(unmodified) and a customized .INF file to add what Dell doesn't give
you.

Keep in mind, though, that two screens running at separate resolutions
are going to be treated as two separate entitites. Without a LOT of
software trickery (that I have never seen implemented) what's on one
display won't be on another when running that way.

William
From: Steve W. on 8 Apr 2010 21:22
William R. Walsh wrote:
> Hi!
>
>> Thanks for the information. I guess I figured it would be possible to
>> run both displays at different resolutions. Guess the only way to do
>> that is with a different type of video card.
>
> If that's what you want to do, it's entirely possible. (But that's
> what you should have asked for! :-))

I just figured that would be the "normal" way it should work. That you
would be able to select the proper resolution independently. BUT
computers never seem to do things that sound like common sense.

>
> Dell's permutation of the nVidia drivers usually has this feature
> disabled. If you want to use it (or a number of other features) you
> may want to take a look at LaptopVideo2Go. They have driver packages
> (unmodified) and a customized .INF file to add what Dell doesn't give
> you.
>
> Keep in mind, though, that two screens running at separate resolutions
> are going to be treated as two separate entitites. Without a LOT of
> software trickery (that I have never seen implemented) what's on one
> display won't be on another when running that way.
>
> William

I'll take a look. Thanks again.

--
Steve W.
(\___/)
(='.'=)
(")_(")
From: Christopher Muto on 8 Apr 2010 22:09
Steve W. wrote:
> Christopher Muto wrote:
>> Steve W. wrote:
>>> I connect up an external monitor and want to see the same display on
>>> both screens.
>>>
>>> NVIDIA GeForce4 440 Go 64meg vid card, Dell drivers.
>>>
>>> I use the Function and F8 and select both displays.
>>> This is where I hit a snag.
>>>
>>> The monitor is designed for a maximum res. of 1280 X 1024
>>> The C840 has a default resolution of 1600 X 1200
>>>
>>> I go into display properties and set display 1 (LCD) to the proper
>>> resolution. Then select display 2 (CRT) for 1280 x 1024.
>>>
>>> The problem is that it doesn't seem to work that way. What am I doing
>>> wrong?
>>>
>>>
>>> And related? How does the S-Video out work? Do you need the special Dell
>>> adapter or just plug an Svid cable in and into the Svid input on the
>>> display device?
>>>
>>> I have the Dell users guide and the service manual. Is there a better
>>> users manual out there? Something that covers all the stuff the machine
>>> can actually do?
>>>
>> afaik both the vga and the svideo connectors on the latitude c840 simply
>> echo what is on the main lcd display. neither is a secondary display
>> port. you can test this rather simply by bringing up the image on the
>> external display and clicking the 'identify' button in the display
>> properties page... either a big number 1 or 2 will appear on the display
>> helping you identify which you are adjusting. i suspect the internal
>> lcd and the externally connected (regardless if it is connected via vga
>> or the svideo port) display will both show a big 1. why you have a
>> display 2 in the display properties page is probably due to having the
>> docking station software installed. the docking station for the
>> latitude c840 has its own video port that can be set for a different
>> resolution than the internal display for easy docking.
>
>
> Hooked up the external and tried a few things.
>
> With the laptop set to the LCD, Identify puts the 1 on the laptop as it
> should.
>
> When set to display on both it shows 1 on the laptop and 1 on the external.
>
> If I select the extend my desktop to this screen then I get a 2 on the
> second display.
>
> None of the above allows me to have each display set to it's best
> resolution though.
>
> What I had hoped was that you could leave the LCD at it's native
> resolution and set the external to it's best and be finished. Guess that
> if I want to use the external I'll just have to live with the smaller
> display on the laptop.
>
> What I'm trying to do is set up a training location for my FD. I was
> hoping to show the different lessons on the external and I could watch
> on the laptop to narrate as required.
>
> HMM I wonder if extending the desktop would allow a powerpoint to run on
> the external display while I have notes open on the laptop? Haven't
> tried that yet.
>

it is normal when enabling the extended desktop feature that both
monitors have to be the same resolution, otherwise what would happen to
the part of the image that is outside of the resolution of the lower
resolution monitor as it get moves from the higher resolution monitor to
the lower? there is a product by matrox called dualhead2go (and
trippedhead2go) that allows you to split a single video port to more
than one monitor. i am not sure if it would allow you to have different
resolutions set for each but it is worth calling them to fund out. the
device comes in analog/vga, dvi, and display port versions.
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