Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.


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

07 Feb 2012   #1
255

Windows 7 Ultimate 64bit
 
 
It detects a nonexistent second monitor - the cursor goes out of view

Please take into consideration that I'm translating terms from my language, so the actual Win7 options names can be different.

Post edited for recapitulation of the problem.
Sometimes my cursor goes out of view (to the right). 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 happens because windows detects a second nonexistent monitor.

If I go to "Screen resolution" and I click "Detect", another monitor appears on the right, near the first one; and it says: "another display not detected".
Clicking on it it says:
Screen: disponible output screen for: ATI Radeon HD 5700 Series.

When I first log in, the mouse stops where it's supposed to stop. I discovered that the "bug" happens when I logoff and log in with another user. When logging off and returning to my account, if I move the mouse at the right edge, it goes off the screen, on the ghost monitor to the right.
So I have to go to screen resolution, clicking "Detect" and "OK" and then everything gets ok.

This problem is annoying because sometimes you just happen to lose your pointer.
Also, closing a fully maximized window with the "X" is annoying because the cursor goes too far and don't hit the "X" button. You have to slowly point at it, you can't do fast moves.

On the Monitors category of Device Manager there's only one monitor:
generic monitor plug and play. ID hardware PHLC074, which seems correct since its Philips.
I'm using VGA (connected on the VGA input of my ASUS EAH5770 CUcore).

I played on the "Screen resolution" window a lot, but whatever thing I do the problem re-appears the next time I load the OS and I log in with multiple accounts.
My monitor is 246EL2SBH Philips, my GPU the ASUS EAH5770 CUcore and my motherboard it's PC-AM3RS890G (Sapphire).
Monitor's and GPU's latest drivers are installed.

What I tried
Formatting Windows. So it's not about old monitors/old GPUs.
Using "Screen resolution" to disable the ghost monitor.
Using AMD Catalyst control center to disable the ghost monitor.

dsperber seems to have that problem too. Please see its post so you can also see an image with the problem (he has two monitors and the third nonexistent one appears on the right; I have one monitor and the ghost as the second one): It detects a nonexistent second monitor - the cursor goes out of view

Is this a bug of Windows 7?


My System SpecsSystem Spec
07 Feb 2012   #2
dsperber

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

Are you saying that Catalyst Control Center thinks you have two monitors connected but you only have one? Strange.

Incidentally, I too have a Sapphire dual-DVI HD5770 in my machine (ASUS P5Q3). But I actually DO have two monitors... both Eizo 24" LCD's running at 1920x1200 each.

Anyway, you can certainly get rid of the extended desktop, i.e. the phantom second monitor using CCC.

Right-click on desktop, select Catalyst Control Center. Then go into Desktop Management, Creating and Arranging Desktops.

If you really do see "1" and "2" then for some reason the HD5770 thinks you have two monitors connected! Very odd.

But you can certainly disable "2". Just right-click on the second monitor icon in the lower part of the display, and select "disable".




Does that help?
My System SpecsSystem Spec
08 Feb 2012   #3
255

Windows 7 Ultimate 64bit
 
 

Quote   Quote: Originally Posted by dsperber View Post
Are you saying that Catalyst Control Center thinks you have two monitors connected but you only have one?
Actually: right click on desktop ->screen resolution, but yes, I didn't think about changing that on CCC. It seems it works now. Thank you.
My System SpecsSystem Spec
09 Feb 2012   #4
255

Windows 7 Ultimate 64bit
 
 

Damn, problem still not solved. The problem appears again. Now the second one is "generic non-plug and play monitor", 1024x768.
My System SpecsSystem Spec
09 Feb 2012   #5
dsperber

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

Did you ever actually have two monitors plugged in at one time?
My System SpecsSystem Spec
09 Feb 2012   #6
255

Windows 7 Ultimate 64bit
 
 

No, but I had a different monitor some months ago, which then I've thrown away.
I've recently restored the Windows partition from an old backup (this is how I re-install windows), but maybe this backup still has some settings of the old monitor, so this could be the cause. Even if this is the case, how could I solve this (apart re-installing windows of course).
My System SpecsSystem Spec
09 Feb 2012   #7
Dwarf

Windows 8.1 Pro RTM x64
 
 

Have you tried plugging the monitor in to the other port on the graphics card?
My System SpecsSystem Spec
09 Feb 2012   #8
255

Windows 7 Ultimate 64bit
 
 

Cannot. The other input is DVI and I don't have such cable. Do you think that the cause could be the VGA connection? Weird.
My System SpecsSystem Spec
09 Feb 2012   #9
1Bowtie

Windows 7 Home Premium 64 bit
 
 

The actual cause is the old image still has the old monitor in it, look in device manager and see if there are 2 monitors listed, pick the old monitor and delete it from there, restart and see if it recognizes your new monitor.
My System SpecsSystem Spec
10 Feb 2012   #10
dsperber

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

Quote   Quote: Originally Posted by 255 View Post
Cannot. The other input is DVI and I don't have such cable. Do you think that the cause could be the VGA connection? Weird.
You can buy a DVI-to-VGA adapter, and then try that.

I believe that as was suggested that your previous situation has left indications in Windows that you actually have (or had) two monitors. And I fear that even if you switch your single-monitor situation over to the other port (with a DVI-to-VGA adapter) Windows will simply swap what it considers monitor #1 in a 2-monitor situation. I'm not sure you're going to be able to fix this "phantom second monitor" symptom at this point.

I had a similar situation just this week, as I'm still recovering from my own upgrade to an HD5770 (dual-DVI) card from an HD4850 (DVI and VGA). I actually swapped two machines, keeping the CPU and motherboard in each machine and reversing the internal peripheral cards and non-C hard drives. The HD4850 remained in the machine that had originally been a dual-monitor Win7, but with the machine reversal it now was in a one-monitor Win7 configuration. And the other one-monitor machine that got swapped... it had its HD4670 (supporting a single VGA monitor) removed and replaced by the dual-DVI HD5770 for my two LCD monitors, and was no longer a one-monitor Win7 setup but rather was now a dual-monitor Win7.

Well the problem was that I'd forgotten to "move all of the windows over from monitor #2 to monitor #1" on the HD4850 machine before I swapped it into its one-monitor configuration. Well now, even though Windows definitely knew I only had one physical monitor connected and for example automatically moved the taskbar over from monitor #2 to monitor #1, any time I would open a program or dialog window (e.g. OPEN or SAVE AS...) which had previously opened on monitor #2, well it was now "off-screen" in the one-monitor setup. And there is no way to get it back onto monitor #1 with keyboard shortcuts, that I know of.

I ended up having to take this now one-monitor HD4850 machine back upstairs and temporarily re-connect it to the two monitors up there, and reconfigure the HD4850 to once again temporarily be dual-monitor. I then had to open every single program to see where that window went, and if it was on monitor #2 I dragged it over to monitor #1. Same with all OPEN and SAVE AS dialogs, Notepad, Firefox, Office programs, etc., etc..

Only once all windows had been brought over to monitor #1 could I now use CCC to disable monitor #2, disconnect the machine, bring it downstairs and reconnect it back to the one-monitor setup, and now everything opened just fine.

Again... the problem is because of the residual information all over the place regarding your former setup. If you don't mind reinstalling Windows from scratch with the new hardware setup (including new video card), you will now no longer have any problems. But replacing a video card (or going from a dual-monitor setup down to a one-monitor setup) is not easy or painless.
My System SpecsSystem Spec
Reply

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




Thread Tools





Similar help and support threads
Thread Forum
Cursor Locks on 1 Monitor
I have a user whose cursor will randomly lock on a single screen. The fix is typically simple, "Alt-Tab" right click on the desktop, virtually anything. This is just an annoyance for the user and for the life of me I can't figure it out. The environment is Windows 7, she uses internet explorer...
General Discussion
Dual monitor cursor lag
I've never had this problem before, though i have never used dual monitors on a computer before, but when i have dual monitors the cursor lags, jumps around and doesn't respond for a split second, this mainly happens on my second monitor but is now happening on both and seems to be getting...
Performance & Maintenance
Broken laptop screen - only detects external monitor safe mode!?
Hi I am puzzling! I am really not a computery person - but dropped my Acer laptp on the floor, and broke the screen - so bought a dell monitor, plugged it in, and it works - but only in SAFE mode. I have tried the Fn F5 or F6 keys, and that doesnt work. When I do that it just freezes to the...
Graphic Cards
Broken cursor on main monitor
Hey guys. I have a problem. Sometimes (randomly) when I move my mouse from my second monitor on to my primary, my mouse pointer gets "broken". I've added a photo of what the cursor now looks like on the primary monitor. (had to take it with my cell) The pointer is always standard icon...
General Discussion
Wake Monitor, No View, Just Cursor
Once again, I am compelled to guess where to post my inquiry, as I don't know what this might be about. I'm rather in the dark, along with the monitor: For the third time over the past few weeks, when I moved the mouse to wake the monitor a short while ago, what I got was a black screen with a...
Hardware & Devices
ATI / Windows 7 Detects False Monitor
I have Windows 7 Home 64 bit installed on an ASUS G73JH With an ATI Mobility Radeon HD 5870. My problem... Whenever I start the monitor up, whether it be turn the laptop on, or just wake it from sleep it detects a false non-generic pnp monitor. I do not have any extra monitors, it is just my...
Graphic Cards

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 02:25.

Twitter Facebook Google+



Windows 7 Forums

Seven Forums Android App Seven Forums IOS App