Bdtyktl

I have been digging around this problem for two days, and found few types of solutions:

1. Universal solution, software program PersistentWindows, which saves all windows position and monitors display. If resolution is changed and changed back, then it restores same sizes and positions! Exactly what I wanted. Latest version just does it's work, and silently sits in systray. Link




2. For some ATI users work, for some not, there are confirmations that it works. Solution is to use registry hack with key DMMEnableDDCPolling, to disable monitor connection polling under Windows at all. Caveat is that you need to restart the system after change, and in case you need just quickly connect some external screen, it is not convenient. Link




3. Lucky are NVIDIA card owners. The solution is to hardcode monitor EDID information to a VGA drivers onfile, and thus system thinks that this does not change. Link




4. Hardware solution for HDMI connection, they sell their adapters on web and also eBay. Link




5. One more utility Windows Layout Manager to save the layouts and restore them on demand (management of various layouts). Much more complex and more powerful, but may be overkill to home user. Link

I stick with #1 for a while (already since 2015 :) ), and if will find more, then will share.

I had this issue with my Radeon R9, all I did was to disable the GPU scalling at AMD Catalyst.

But for some reason still occurs, first backup your registry!
Then open your windows registry and go to:

HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlGraphicsDriversConfiguration

Only under the "SIMULATED" keys, change the keys decimals to:

PrimSurfSize.cx = 1920

PrimSurfSize.cy = 1080

Under "00":

ActiveSize.cx = 1920

ActiveSize.cy = 1080

Change to what ever resolution you are using. This will prevent your window to shrink or move from one side to the other when you turn your monitor off.

Your hunch is correct; the monitor is essentially shutting off the handshake on that HDMI channel when you switch the input. Windows 7 sees this as "There is no longer a monitor connected here", at which point it disables that output. Since that screen no longer exists, everything that was on it has to go SOMEWHERE, so it shuffles everything onto your remaining displays, and it is not graceful. When the display returns, Windows 7 will remember how you had things arranged to some extent, but it's not going to shuffle your windows back around (you may have closed or opened or otherwise moved them in the interim, after all!).

There's nothing you can do with display drivers that can fix this; it's the behavior of the operating system and while it's inconvenient for your situation it makes sense. (The alternative is having things on monitors that don't actually exist, which XP did sometimes and let me tell you it was a nightmare.) There may be some third party software that can force this to not occur, but I don't know of any offhand and I suspect you'd run the risk of causing other problems. (If anybody can actually post any I'll be glad to upvote those answers.)

No additional hardware required

1. Install TeamViewer or Chrome Remote desktop on the computer with the problem, and enable remote connections.


2. Turn the TV/monitor off.


3. 
   The resolution changes on its own.


4. Log into the computer remotely using the software from step 1. As stated in the question, the resolution has changed.


5. Increase the resolution back to normal (as it is when the TV/monitor is on), using your remote connection.


6. The resolution will no longer switch when the TV/monitor is turned off.

Your problem sounds like a variation of the one described here, which is also caused by loss of the HDMI handshake. The same hardware solution might work for you: place an Apogee 3x1 HDMI mini switcher between the PC and the TV, and it will make the PC think it isn't disconnected. I don't know whether any HDMI switcher will work or just the Apogee recommended at the above link.

After months of frustration and finally finding this thread, I found a workaround that seems to work for my single display setup (Windows 7 x64 + 24" Insignia TV). This is a generalization of the solution by David M., with the following advantages:

• HDMI/DVI adapter not required


• Can use VGA cable instead of DVI cable + adapter


• Keep HDMI audio output (vital for my TV, which only supports audio line-in for its blurry analog VGA input)

However, a free VGA (PC) input on TV is needed, and two cables get committed to the setup:

2. Connect PC to TV with HDMI cable


3. Also connect PC to TV with VGA cable


4. Control Panel > Display > Multiple displays > Duplicate these displays

Alternatively, DVI cable + DVI/HDMI adapter in step 2 also worked; the key observation was David M. pointing out that DVI works fine.

Now, when I power cycle or change input sources on my TV, the windows don't shrink or stack onto the top left. Not sure if this all worked just because my TV is so low-end...

The issue is caused by an annoy "feature" of Windows 7/8 to re-arrange application windows when HDMI/Display port connected monitor/TV "turned off" or "switch to" different input.

There is a hardware workaround if you use HDMI connection. Search ebay for "monitor detection" and get one around $20. It works for me on a Seiki 39" 4K TV with HDMI connection.

I was having the same problem on my LG 42" TV. After reading the posts here about spoofing the signal to Windows I thought of something. I had an extra DVI-HDMI adapter I no longer used. Plugged that into the DVI port on my video card and then the HDMI into that and no longer get the issue of windows re-sizing and whatnot. So it happened to be a really easy fix. You can get them at RadioShack or pretty much any electronics store. I'm glad I got this sorted out. Hopefully it works for others.

Researching the same problem, I found this thread claiming it can be repaired by messing around in the registry. I also found a thread by a guy who claimed it was a result of using DisplayPort.

I tried the registry fix, and it didn't seem to work (although I didn't reboot, if that makes a difference). Additionally, my misbehaving device is connected to a displayport on my graphics card from a DVI port on my monitor, and unfortunately I can't confirm the second account since I don't have appropriate adapters. But, I thought it might be useful.

Edit: ok, I got desperate and actually drove out to borrow a cable for this attempt. Changing from a DVI-I cable with DVI/DisplayPort adapter cable to a single-cable DVI-I/HDMI cable has fixed this for me. To me this suggests either that it is indeed a problem with DisplayPort, as suggested by the guy on HardForum, or that it's a side effect of using cable adapters. Either way, happy to be done with it.

Not a fix, but a workaround. I noticed that if you minimize windows before the display is powered off and do not restore them until the display has returned, then the windows are not rearranged.

I leverage that fact to provide a 'seamless' experience for myself as I have documented here:
http://thelamprechts.blogspot.com/2014/09/a-windows-workaround-to-maintain-window.html

If you're using ATI you will need to create a new key in the registry under HKEY_LOCAL_MACHINE > System called DMMEnableDDCPolling. Set the Value to 0. It disables the video card from polling to see if something is still connected basically.

If you're using something other than ATI search the registry for the key DMMEnableDDCPolling and set the value to zero. NOTE: THE KEY CAN EXIST IN MORE THAN ONE PLACE. From what I read you must replace the value with 0 for every instance of that key.

Source.

In case anyone else encounters this, I'll just add my "fix".
I found out that Windows 8.1 resized all of my windows/programs and such, when I put them on my TV. (Connected to my laptop, through a HDMI port.)
I had to access the screen resolution menu, choose "Make text and other items larger or smaller", choose "Lad me choose one size for alle monitors" And then let them stay at 100%.
DONE!

I had a similar issue since upgrading a Windows 10 machine to TH2 in November 2016.

Due to the various side effects a TV power cycle was having on my apps and desktop I eventually realized that turning off and on the TV caused Windows 10 to trigger a change of resolution and/or font size/DPI.

After some research I forced the same DPI for all my displays, virtual and physical by doing the following:

• Go in Control PanelAppearance and PersonalizationDisplay.


• Click on set custom scaling level.


• Set it to whatever works for you. 100% was working fine for me.

Here is a link on how to adjust scaling.

I had this issue with a computer going to screen saver. When it resumed, my windows were re sized. I solved it by changing to another screen saver and then reverting back to the "photos slide show" screen saver.

I was able to stop this resolution change by going into catalyst control center and turning on force edid emulation. Fixed!! Of course you need an AMD card and this feature needs to be present but I guess NVIDIA should have something like this too.

This is a super old question, but I actually have a really simple fix for Windows 10 users (It may work for 7 and 8, not sure).

I specifically wanted my windows to remember their positions, and was using a KVM to switch between two computers, but whenever I'd switch back, all the windows would move back to the primary monitor.

I found that if you click the small "Minimize All Windows" sliver in the bottom right, on your taskbar, before you make the switch, when you come back you can just click it again and the windows will return to their previous positions.