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Windows 7: How works display identification in Windows 7

04 Oct 2013   #1
win7confusions

windows 7 32 bit
 
 
How works display identification in Windows 7

Hi,

does anybody know how the display identification works in Windows 7. How does Windows(or the graphic adapter) decide which screen is number 2 and which is number 1?

Background: We develop a software that runs on systems whith 2 monitors. Usually 1 monitor is for the customer and another monitor is for the advisor. We can configure our application so that the customer application runs on display 1 and the advisor application on display 2 or the other way round.

So how do i figure out which monitor becomes screen1 and which one screen2 after installation of windows?

best wishes
Samuel


My System SpecsSystem Spec
.

04 Oct 2013   #2
Dude

Windows 8.1 Pro + Windows 10
 
 

Samuel, welcome to seven forums. The graphics card determines the monitor number. Here is a pic of mine . It will start at the top left then go right and then the bottom row. Because I have my Dell on the display port it is number 1, then the HP is number 2.

How works display identification in Windows 7-graphics-connection.png How works display identification in Windows 7-monitor-numbers.png


My System SpecsSystem Spec
04 Oct 2013   #3
SandeepP

Winndows 7 32 bit
 
 

Quote   Quote: Originally Posted by win7confusions View Post
Hi,

does anybody know how the display identification works in Windows 7. How does Windows(or the graphic adapter) decide which screen is number 2 and which is number 1?

Background: We develop a software that runs on systems whith 2 monitors. Usually 1 monitor is for the customer and another monitor is for the advisor. We can configure our application so that the customer application runs on display 1 and the advisor application on display 2 or the other way round.

So how do i figure out which monitor becomes screen1 and which one screen2 after installation of windows?

best wishes
Samuel
Hi Samuel,

Welcome to Seven forums.

I would also concur with Dude it is graphic card function to decide which display to set as primary. I use my laptop with a TV or Monitor and internal LCD would always be set as number 1 and then anything else.

Not quite sure about Desktops, I believe first connected Monitor would be considered as number 1 and any other monitors connected would be number accordingly.

However, you should be able to configure whether which Monitor would be primary and what display you would require on the same monitor.

Hope it helps.
My System SpecsSystem Spec
.


07 Oct 2013   #4
win7confusions

windows 7 32 bit
 
 

Hi,

thank you for your replies. Right now I'm quite sure that it is the driver of the graphic card that determines the monitor number. I was a little bit confused - because when we installed the system with Windows XP the monitor numbers where different than with Windows 7(even with the same hardware). So if Windows does not any magic with the monitor numbers - and I think it doesnt - it should be the graphic driver.

best regards
My System SpecsSystem Spec
08 Oct 2013   #5
SandeepP

Winndows 7 32 bit
 
 

Quote   Quote: Originally Posted by win7confusions View Post
Hi,

thank you for your replies. Right now I'm quite sure that it is the driver of the graphic card that determines the monitor number. I was a little bit confused - because when we installed the system with Windows XP the monitor numbers where different than with Windows 7(even with the same hardware). So if Windows does not any magic with the monitor numbers - and I think it doesnt - it should be the graphic driver.

best regards
Hi win7confusions,

Thanks for posting this reply. I understand graphic driver decides which one would be a primary monitor and which one would be secondary.

I am sure this information might be useful for other users as well. If you have any further queries, please feel free to contact us.
My System SpecsSystem Spec
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 How works display identification in Windows 7




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