How to make HDMI work on duplicate mode?

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Discussion Overview

The discussion revolves around troubleshooting issues with HDMI connections, specifically focusing on getting duplicate mode to work properly between a laptop and a TV. Participants explore various technical aspects, including resolution settings and compatibility between devices.

Discussion Character

  • Technical explanation
  • Debate/contested
  • Exploratory

Main Points Raised

  • One participant reports that their HDMI cable works with another laptop but not with their own, expressing difficulty in achieving duplicate mode with a properly fitting resolution.
  • Another participant questions whether the laptop is compatible with the TV, suggesting that the issue may not be the cable.
  • A later reply asserts that the cable is not the problem, indicating successful connection in extended mode but unresolved resolution issues.
  • Participants inquire about the type of video card being used, with one mentioning an ATI card and another using Intel HD Graphics.
  • One participant shares that their video card defaults to a lower resolution for the secondary display upon restart, suggesting that driver updates may be necessary.
  • Another participant expresses frustration with HDMI communication, noting that incorrect audio capabilities may affect the connection and suggests experimenting with different resolutions.
  • Recommendations include setting the laptop's resolution to common formats like 1920x1080 or 1280x720.
  • One participant advises checking the TV's manual for maximum supported resolution and ensuring that the laptop's output does not exceed this limit, while also considering the aspect ratio differences between devices.

Areas of Agreement / Disagreement

Participants express differing views on the source of the problem, with some attributing it to cable compatibility and others to resolution settings or device compatibility. The discussion remains unresolved with multiple competing perspectives on how to achieve the desired outcome.

Contextual Notes

Limitations include potential misunderstandings about device compatibility, missing information on specific settings, and unresolved issues regarding driver updates and resolution adjustments.

Hood
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I have a brand new HDMI cable that was successfully tested with another laptop but it doesn't work with mine. I tried everything but I only manage to get extended mode working which still doesn't have good resolution on my tv. On other resolutions it doesn't work and on duplicate mode none of the resolutions work. How to make it work on duplicate mode so that it would perfectly fit the screen of the tv?
 
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Are you sure your laptop works with your TV? From what you wrote it is not clear if it is the cable that is a problem.
 
Borek said:
Are you sure your laptop works with your TV? From what you wrote it is not clear if it is the cable that is a problem.

Cable is definitely not the cause of the problem. I'm even capable of connecting it on the extension mode but there is something wrong with the resolution since the view doesn't fit.
Waiting for the response on how to connect it on duplicate mode with perfectly fitted screen.
 
Hood said:
Cable is definitely not the cause of the problem. I'm even capable of connecting it on the extension mode but there is something wrong with the resolution since the view doesn't fit.
Waiting for the response on how to connect it on duplicate mode with perfectly fitted screen.

Which video card are you using?

I have an ATI brand card, I had to download the drivers & software package.

The software allowed me to make changes to the secondary display.

The resolution is changed by right clicking on the desktop, and selecting "resolution" (or whatever it is). From there you can select the secondary display and change the resolution.

For whatever reason my video card defaults the secondary display to a 720p or similar format every time I restart the computer.
 
nitsuj said:
Which video card are you using?

This is what I find: Intel(R) HD Graphics Family
 
Hood said:
I have a brand new HDMI cable that was successfully tested with another laptop but it doesn't work with mine.

Hood said:
Cable is definitely not the cause of the problem.

You've lost me.

Not that I have any ideas.
 
Try setting your laptops resolution to 1920x1080 or 1280x720.
 
two things. First find the manual for your TV and figure out what the maximum supported resolution is, you might be trying to run a resolution bigger than what your tv will support.

then go to the intel website and download the latest video drivers for your system and install them.

Keep in mind that if your monitor is widescreen and your TV is not (or vice-versa), then the display will not fit on both correctly. Essentially, you're taking different shaped screens and saying the same image is not occupying all the space on both screens. It's not supposed to.
 

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