asked on

Disable Windows 7 Auto-Resolution with Projectors

As soon as I plug in my digital tv to my laptop via an RGB Cable, windows forces my laptop resolution to change. Then, any issues on the TV will cause my laptop to flash back and forth between resolutions (as soon as I unplug the monitor, for example, windows changes my resolution again). I do not want this. How do I tell windows 7 to stop "detecting" whether or not I have a monitor plugged?

I want to manually set my resolutions at all times and have Windows stop auto-changing it for me, no matter what monitor I have plugged in. Thanks

By the way: changing this key to 0 does not work-

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\TMM

UseIViewHelper = 0
(setting this key does nothing at all, my laptop still auto-changes my resolution at will when other monitors are connected/disconnected)

I want to force my laptop into one resolution, and let the external device deal with it.

Davis McCarn

Many of the settings are driver specific meaning different for NVidia versus ATI and can also be version dependant (yuck).
You might want to try changing what Windoze does when it detects a new monitor. The default is to mirror which is what is causing your issue: http://windows.microsoft.com/en-us/windows-vista/Multiple-monitors-frequently-asked-questions
You can change from mirrored to extended.

Callandor

A third party tool like PowerStrip (http://entechtaiwan.com/util/ps.shtm) might help.

SOLUTION