Can no longer duplicate display to external monitor on Windows 7

Posted by rbeier on Super User See other posts from Super User or by rbeier
Published on 2011-09-07T01:25:50Z Indexed on 2012/09/20 21:42 UTC
Read the original article Hit count: 151

Filed under:

windows-7

|

multiple-monitors

|

monitor

|

projector

We have a large TV at work - I connect my laptop to it to share my screen during meetings. Until today, my laptop display has been duplicating to the TV automatically when I connect the TV cable to the laptop. The display resolution would decrease automatically to be compatible with the TV.

Today, however, it's stopped working. When I connect the cable to the TV, the display extends rather than duplicating. Using the Win+P key combination (or Fn+F7 on my Lenovo laptop), I can choose to duplicate the display - but when I do this, it ends up only displaying on the laptop. I can get it to display on the TV by hitting Win+P and choosing "projector only", but then I can't see what I'm doing on the laptop screen.

I have a Lenovo W520 laptop running Windows 7, connected to the TV using a DisplayPort-to-HDMI converter cable. The TV's native resolution is 1280x720; the laptop's native resolution is 1600x900.

I've tried booting with the TV cable already connected; I've tried manually lowering the display resolution on the laptop to 1280x720 before duplicating the display. Neither works.

Does anyone have any other suggestions?

© Super User or respective owner

Related posts about windows-7

Server 2012 DFS New Member Issue

as seen on Server Fault - Search for 'Server Fault'
I am trying to add a new member to our DFS topology. We have 3 DCs (VMs - VMware) running Windows server 2012, two servers are located in or Primary site and the third at our DR site. Currently the two servers at our primary site are currently replicating DFS (full mesh) and are working fine. I have… >>> More
error in IIS7 but not on IIS6

as seen on Server Fault - Search for 'Server Fault'
I have a website that is we are now deploying to windows 2008 servers that has worked in the past on IIS6 without a problem. It is using .net 2 framework. Most of the website works. Just when we create a screen report over a certain size on the server we get this error. Event code: 3005 Event… >>> More
error in IIS7 but not on IIS6

as seen on Server Fault - Search for 'Server Fault'
I have a website that is we are now deploying to windows 2008 servers that has worked in the past on IIS6 without a problem. It is using .net 2 framework. Most of the website works. Just when we create a screen report over a certain size on the server we get this error. Event code: 3005 Event… >>> More
Microsoft Management Console stops working when I add snap-in to it

as seen on Super User - Search for 'Super User'
I have Windows 7 Ultimate OS. I'm opening mmc.exe as administrator and trying add Certificates or any other snap-in, then while loading that snap-in MMC breaks and displays following message and after that it closes automatically once I click on close button on that message. What could be the problem… >>> More
Handling keyboard and mouse input (Win API)

as seen on Game Development - Search for 'Game Development'
There is a number of ways to catch mouse or keyboard under Windows. So I tried some of them, but every of them has some advantages and drawbacks. I want to ask you: Which method do use? I've tried these: WM_KEYDOWN/WM_KEYUP - Main disadvantage is that, I can't distinguish between left and right-handed… >>> More

Related posts about multiple-monitors

Multiple monitors with virtual machine

as seen on Super User - Search for 'Super User'
Is it possible to use multiple monitors with Windows Virtual PC 2007? If not, are there any other virtual machines that do support multiple monitors? >>> More
What's the Benefit of Multiple Monitors

as seen on Stack Overflow - Search for 'Stack Overflow'
It's become apparent to me that in Software Development it's not uncommon to have more than 1 monitor. We've been pushing for multiple monitors here (currently I have 1 19") but it's difficult to get the point across to the 'deciders' that there would be a benefit. They're only concerned with saving… >>> More
Best way to setup multiple monitors?

as seen on Super User - Search for 'Super User'
Hello, I currently have 5 displays. The following is how I installed them. Three 19'' for workspace. One of them is connect directly to the graphic card via DVI. Two of them are using usb graphic adapters. One 720 projector - directly connect to the graphic card via DVI. One 30'' dell monitor -… >>> More
Multiple Monitors

as seen on Geeks with Blogs - Search for 'Geeks with Blogs'
At my workplace .Net developers get pretty much the same equipment. A decent Dell workstation / Desktop, mine is a Dell Precision 390. One dual core 2.40 GHz. Eight GB RAM. Windows 7 Enterprise 64-bit. Two Dell 20.1 Monitors. I'm happy with this. The machine is about 3 years… >>> More
Multiple Monitors with Virtual Machin

as seen on Super User - Search for 'Super User'
Hi, I have just installed Windows Virtual PC 2007, and was wondering if I could use multiple monitors with a virtual machine using it? If not, are there any other Virtual Machines that do support multi monitors? Thanks >>> More