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Windows 7: It detects a nonexistent second monitor - the cursor goes out of view

30 Aug 2012   #31
255

Windows 7 Ultimate 64bit
 
 

So if I've correctly understood, this problem could be caused by having a GPU which supports two (or more) monitor, right?


My System SpecsSystem Spec
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30 Aug 2012   #32
3D Jed

Windows 7 pro x64 SP1
 
 

I don't think you have a problem. My mouse goes to the edge at top and left. On the other 2 sides the mouse can go past the edge. If you don't like your mouse going off the screen, stop when you get to the edge.

We have a saying in the UK - 'you're pulling my leg'. Google it.
My System SpecsSystem Spec
30 Aug 2012   #33
255

Windows 7 Ultimate 64bit
 
 

Ah, I see, you didn't carefully read my recapitulation post.
I'll paste here this for you:
Quote:
I know that the cursor is almost invisible when it hits the right, but it's not that, it's actually going far off the screen and I have to move the mouse a lot back before seeing the cursor again.
This of course is not the normal behavior, and it's annoying because:
1) quickly closing a maximized windows with the "X" becomes difficult;
2) sometimes you simply lost your mouse because it goes into the second ghost monitor.

I'll try to make that sentence in bold or something.
My System SpecsSystem Spec
.

30 Aug 2012   #34
dsperber

Windows 7 Pro x64 (1), Win7 Pro X64 (2)
 
 

Quote   Quote: Originally Posted by 255 View Post
So if I've correctly understood, this problem could be caused by having a GPU which supports two (or more) monitor, right?
I would say yes.

I note that you have an HD5770 in your specs, which potentially can support 2 monitors. On one of my machines I also have an HD5770 but I also do have 2 monitors, which just the other day I reversed so that what was previously primary/#1 (on my left) became extended/#2 (and still on my left) and what was previously extended/#2 (in front of me) now because primary/#1 (and still in front of me).

So it used to be #1 - #2 and is now #2 - #1. And previously the desktop extended from pixel 0 -> 1919 on #1 (on my left), and 1920 -> 3839 on #2 (in front of me). Now it goes from -1920 -> -1 on #2 (on my left) and 0 -> 1919 on #1 (in front of me). Moving the mouse horizontally allows the cursor to cross from the left-edge of #1 (i.e. pixel 0) onto the negative pixel real estate of #2, but it cannot go further left than the left edge of #2 (i.e. pixel -1920). However moving the mouse to the right of #1 (i.e. pixel 1919) does not fail, and the mouse moves off into invisible pixel territory of 1920 and higher. So the left desktop edge of the monitor on the left is that absolute limit of leftward mouse movement. But there does not seem to be such a limit of the right edge of the monitor on the right, at least not when there once used to be a monitor to the right of desktop pixel 1919.

I can also perform a similar experiment on my other machine, which is single-monitor but has a dual-output HD4850 video card. In fact, this Win7 machine used to exist in a 2-monitor environment (also with #1 on the left and #2 in front of me, so desktop pixels ran from 0 - 3840) until I changed it to be 1-monitor. So while there is currently no monitor connected to the second output on the video card, there used to be one.

Anyway, I have the same issue in this second machine... where I can't move the mouse further left than desktop pixel 0 (i.e. the left edge of my one and only #1), but I can move it to invisible territory to the right of the right edge of my one and only #1), i.e. to desktop pixels 1920 and higher. Don't know if this is because I used to have a second monitor out there to the right, or simply because I have a dual-output video card (even though only one display currently shows in Catalyst Control Center and Windows "screen resolution").

And for sure, it's not clear whether this is actually an ATI driver issue, or a Windows issue.

I don't consider any of this "problematic". Sure, it's "curious" and "interesting", but not a problem. Sure, we have to live with it because that's the way it seems to work (and we can't really figure out why it's allowed), but what can I say?

And as long as I know how to MOVE an off-screen invisible program window back onto the visible desktop (which happens for some apps when you reverse monitors in a 2-monitor setup, based on where the program window last opened) that's all I really care about to overcome "invisible program windows".
My System SpecsSystem Spec
15 Dec 2013   #35
Guybrush2

Windows 8 64 Bit Basic
 
 

I too have this problem, and it is a real problem.

Here's my story.

Tonight at work, I plugged my secondary monitor into my laptop, via VGA as I do every night. After I logged into windows, I noticed that my Laptop's built-in display was off. Not just black, but actually off.

I tried to open the Screen Resolution window by right clicking on the desktop, but the window appeared off screen somewhere. After "fishing" for it with my mouse, I was finally able to click-and-drag it back onto my main display. Apparently my computer thought that my laptops built in display was disconnected, and instead a phantom display was connected.

Windows continued to appear on the off-screen phantom monitor, and my laptop was still off. After a several reboots nothing was improving. Finally, after tweaking and balancing the windows resolution settings, I was able to get my monitors to look like normal, but now the third monitor is still present.

I set the third monitor to be "detached," but it doesn't disappear. It never used to be there before.

Now I permanently have a 3rd monitor that I can't make go away. I haven't tried restarted yet again because I'm at work and I don't want to spend the next hour re-hacking it to get it to display properly again.

What was really bad, was for the longest time I had both the lap-top, the desktop monitor, and the phantom monitor all running at once, with the phantom BETWEEN the desktop and the laptop, so when I would move my mouse from one to the other it would disappear for a few seconds while traversing the phantom one.
My System SpecsSystem Spec
16 Dec 2013   #36
255

Windows 7 Ultimate 64bit
 
 

Hi Guybrush2.
I've never solved this problem. In the meanwhile I've switched to Seven 64 bit.
My current workaround is using Autohotkey to quickly delete the phantom monitor with a hotkey.
Everytime I start Windows I use that hotkey and then the PC is ok for the rest of the day, as long as I don't login with other accounts.

I can even shutdown the PC, wait e.g. an hour and then start it again and it's still ok.
But the next day the phantom monitor would be there again, very weird. I guess ghosts revive at night.
My System SpecsSystem Spec
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 It detects a nonexistent second monitor - the cursor goes out of view




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