14

I have a Windows 7 PC with TeamViewer installed on it. This computer is always on and has no screen, keyboard and mouse attached to it, only an internet-cable.

I login from my Mac on TeamViewer, create a connection to my Windows 7 PC and the result is an 640x480 screen. The problem is that my Windows 7 PC does not detect any display.

If I check display settings in Win 7 then this happens: enter image description here

I can't select another resolution. How can I choose another resolution?

Canadian Luke
  • 24,640
Pieter
  • 141

8 Answers8

4

Try this :

  1. Access Control Panel -> Appearance and Personalization -> Display -> Screen Resolution -> Advanced button.
  2. In the Adapter tab click List All Modes.
  3. If not enough modes are shown, try to uncheck the Hide modes that this monitor cannot display checkbox in the Monitor tab.
  4. Click on a resolution to choose it
  5. Click OK twice.

image

harrymc
  • 498,455
4

If installing the latest graphics driver hasn't helped you, then this might.

It's a tutorial on how to create a dummy VGA plug so your computer thinks you have a monitor connected. However, I haven't tried this out myself so I have no way of knowing it'll work for sure.

I found out about this from a Super User answer here. Let me know if this helps.

Community
  • 1
Vinayak
  • 10,885
3

@ChrisN comment is the right answer. I'll post it as an answer to the readers:

In my nVidia Control Center, I can go to Display-->Change resolution, click on Customize, and click Create Custom Resolution: Creating custom resolution

After that, select the checkbox that adds it to the list of resolutions and select in on the main "Change resolution" screen.

JBaruch
  • 178
2

There is no Screen, so Windows Detects that there is no screen.

all you have to do is connect a monitor to it, you don't have to use it, just connect it.

another option is to purchase a Dummy Dongle, it sounds like there are a few of them out there if you know where to look, another Superuser was able to find this DVI-Dummy it seems pretty expensive to me, but I have never had the need to do something like this before.

another option is to look for people that do stuff like THIS I don't really know what they are talking about with the EDID Dongle, but it sounds like you can make the graphics card think there is something of a certain resolution connected to it.

Malachi
  • 1,063
0

I think there is decent solution (at least for Windows 7) that does not requires hardware dummy adaptors. I used this solution with the following setup:

  • A windows 7 (pro) laptop with a 1360x760 screen and an Intel (#1)
  • Another pc connected to an HD screen 1920x1080 (#2)

On the windows 7 laptop (#1), enter control panel->display (or search for “display” in the control panel search box) -> connect to a projector.

In my case, I keep the windows 7 laptop (#1) lid closed, therefore I picked “projector only” and clicked ok on the message telling me that there is no projector connected…

Next, I changed the resolution in “adjust resolution” to 1920x1080.

On the PC connected to the HD screen (#2) in the teamviewer->View menu, I have verified that scaling is set to “best fit”.

When teamviewer is not set to full screen the resolution is not accurate (part of the screen’s height is used for the window around teamviewer). You have two options:

  1. Work in a full screen mode (view menu->switch to full screen)
  2. Adjust the resolution (custom resolution) in laptop #2 (I used 980 height instead of the default 1080).

Hope it will help.

0

I got this to work WHILE being remote in on Teamviewer in TWO steps:

STEP 1 Per ChrisN comment..

"In my nVidia Control Center, I can go to Display-->Change resolution, click on Customize, and click Create Custom Resolution: Creating custom resolution (1280 x 720))

After that, select the checkbox that adds it to the list of resolutions and select in on the main "Change resolution" screen.

STEP 2: Right-clicked on my Desktop --> Properties --> Display Setting, and 1280 x 720 showed up. Set and displayed perfectly.

Dan
  • 1
-1

If you can switch to a Windows Remote Desktop Connection you don't need any dummy to get a higher resolution. Of course this is no answer to your question, but it helped me in the same situation.

robotrovsky
  • 1
-1

I have 2 Desktops, 3 Laptops, 2 Android Tablets and 1 Android Moto phone. All with Teamviewer. I encountered the "640x480" intermittently, it seems. Sometimes my Remote Display is good, sometimes not. Even logging in to remote displays from different devices gave no solution. You know what I finally realized?.... (This just may be something specific to me-not that I'm special). After updating my Graphics Drivers, the 640x480 (sometimes) corrected itself. Then, using the Graphics Driver Install from Teamviewer, would revert my display back to 640x480. Hmmm.......So now, I keep my Manufacturer Graphics Adapters set for the Card/Monitor on the systems. Been this way for more than 6 months (at one time, I was having such problems, I redid all Passwords and Security Settings, thinking someone may be "listening" to my connections). Silly me.

Anyway....Uninstall Teamviewer GMH / GBH / Or whatever that Graphics Display Driver is, and update your Driver for the Specific Adapter and Monitor attached. If there is no monitor attached, it should still work just basing it off of the Graphics card installed in the system, provided you're able to navigate the whole of the screen to select miscellany.

Hope this helps some of y'all, if not all y'all.

user352743
  • 1