Problems centralizing windows on dual monitor

Hi all,
every time I create a JFrame on my aplication, I use the method setLocationRelativeTo trying to centralize it.
I used to pass null to this method every time I call it, but recently I got a dual monitor and discovered that passing null to it makes the new frame open half in the left monitor and half in the right monitor.
Most of the times, it opens centralized in the primary display, but sometimes things get messy.
Does anybody knows how can I make frames open on the same display the application is showing?

Take at look at this class (and the example that is given)
http://java.sun.com/j2se/1.5.0/docs/api/java/awt/GraphicsConfiguration.html

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Mac and Windows with dual monitors Question

I use a Intel MacPro running Tiger with latest updates in my church. We use the Mac and Keynote 2.0.2 to present PowerPoint slides on the big screen (dual outputs). Everything was going well until the pastors upgraded to new computers running Vista and Office 2007. Now neither pastor's files will load into Keynote. It comes up with an error. The pastors have saved their files from PP as 2003 PPT files, and they still will not open. Error - unable to open file type. The one pastor went back to XP (dumped Vista) but still used the Office 2007 program and saved as PP2003, but the error still appears.
FYI - I noticed that Office 2007 saves with a file with the extension of .pptx instead of the .ppt. Checking the file they gave me shows that it is indead a .ppt file and not .pptx file. It makes no difference.
I believe it is an Office 2007 problem I'm dealing with. I have taken the .ppt file and loaded it onto the PC running PP 2003 and it loads fine, except for some format problems. I then resave it with a different name and tried to load that file (hoping it was converted) , with the same error showing. The problem is transfered with the file. Other files created with the PP 2003 program load fine into Keynote, so it has to be the Office2007 doing something.
So the questions are, is there an easy fix and still use the Keynote program, OR does Keynote 3 take care of this problem in the upgrade, OR should I install Win XP home or Pro and use parallels (which I have)? Would WinXP Home be enough to support the dual outputs and be fast enough? I am familiar with XP Pro not Home.
Any information you may have, could be a help. I need this resolved soon. I hate having to bring in the old Windows PC, after enjoying the quality of the Mac.

David.Austin.Allen wrote:
You should not have issues attaching two displays to the Mac mini. You will not be able to use an iPad as one of those displays.
I have no issues streaming video on demand from all of the media sources which you have listed. My Mac mini is the Early '09, so my hardware is not as powerful as the newest Mac mini.
Dah•veed
Thanks David - glad to here the Mini supports dual monitors, and you're not having any streaming issues. Did you have any special settings, like "no hardware acceleration"? Are you streaming HD content?
If it supports dual monitors, then I would think the iPad could be used as a second display and input device - the demos I've seen with Air Display (from Avatron Software") would accomplish what I'm looking for. Here is a demo at http://www.vimeo.com/16950420 showing the iPad working with a Windows machine, but I've seen them working with Macs as well.
Thanks again
Michael

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Hello,
I am experiencing a problem with my new dual monitor setup.
A few days after I installed the new monitor (DELL U2312HM), the DVI with the old monitor (LG M208WA) stopped from working.
The old monitor went in power saving mode, and I couldn't wake it up.
After a few days working with only 1 monitor, without taking any further actions such as drivers re-installation etc, the pc boots and the monitor wakes up again!
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Quote from: delice on 17-January-12, 04:44:15
Is your problem completely gone?
I have the lightning version, same thing happened to me. I will try the last thing that fixed your problem - but if it does not solve or problems start again, I guess the best option is to get a replacement RMA.
This is the second time the 2nd DVI stopped and then started again (with the method mentioned).
After the last time it started working, everything is fine.
While having the problem, I tried to plug in only 1 monitor in that DVI and boot the pc, the boot screen appeared fine, but when entering windows it went power saving.
So i guess it is not an issue of RMA.
I guess Windows or the nVidia drivers under some unknown (to me) circumstances are causing this.
Please post here if my solution worked for you too.

Maximising Safari on a dual-monitor setup (GUI behaviour in Window XP Pro)

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When I maximise Safari on the 1st monitor it fills the screen as I'd expect.
Windows XP Pro

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Unwanted keyboard shortcut with dual monitors

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to the main monitor. In the word document, 1 and 2 are typed in the document, but pushing the keys still move the window and mouse to the opposing monitor.
I checked the keyboard settings within Windows and found that sticky keys and such are not enabled. The keyboard has no such features to enable. I also checked the display setup in display properties and found nothing that would indicate such a setup. Google
searches return nothing related to my problem.
What I do know:
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Windows XP
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This pertains to StarTech DVI to USB adapters.
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10:20:14 AM
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Flash CS3 crashes when I have the actions panel open on my
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The other issue I have found is that when I open Flash up
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OK the problem isn't the DUAL Monitors, but rather having a
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Dual Monitors Windows 7 Problems

Ok, this problem is getting really annoying and I think its a problem with windows 7 itself and not my computer.
Basically I have a dual monitor setup with the left hand monitor as my secondary and right hand monitor as my primary. Whenever I have an application with any graphics on it at all such as a progress bar on my left hand monitor moving windows around becomes laggy and juddery, yet this doesn't happen when the graphical app is on my primary monitor!
My system Specs:
ASUS Striker Extreme MOBO
OCZ 850W gameXtreme
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Nvidia 8800GTX
Sound blaster x-fi Xtreme Gamer (older PCI version)
3 x 80GB HD for system drive in RAID 0
1 x 500GB and 1 x 250GB drives for storage
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Memory: 5.9
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Gaming Graphics: 6.8
Primary HD: 5.9
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Updating to latest drivers
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Installing 64-bit version
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upgraded my PSU
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(Latest update) This is the best I can do to alleviate the problem, and does reduce its severity immensely, but I found myself still noticing some slight playback glitches in videos on my second monitor which probably also translate to anything else with movement. I have tested with a panning scene in one of my videos and there is a subtle micro-stutter on my second monitor which I can find no way to fix. This doesn't occur if outputting to a single display, one or the other, nor does it occur when playing the video on my primary monitor in a dual-monitor configuration. Note that when I say "primary monitor", I am not referring to the monitor Windows has marked as primary, but my actual monitor rather than TV. In a dual-monitor configuration, this micro-stutter will only occur when playing video on my right monitor (TV), regardless of settings or which ports the monitors are connected to on the GPU. The micro-stutter occurs with no relation to the activity on the other screen, as it can be completely still. I can confirm the micro-stutter does not occur at all with Desktop Window Manager (Aero) disabled. In short, this is a nightmare.
(Note that this micro-stutter is equally replicable in the 182.50 (WDDM1.1-less) driver, meaning there is no way to solve it other than disabling Aero or outputting to a single monitor.)
I think I've solved the problem.. for me, anyway. I've divided this into short answer and "long answer", which is closer to a stream of consciousness in some ways, as I found out about Force10Level9 as I was writing.
The short version:
I've found some registry keys which seem to have fixed the problem for me. I haven't experienced any side effects, but use the tweaks at your own risk!
I don't know exactly what they do. This comes from a lot of.. experimentation. I believe FrameRateMin tells the Desktop Window Manager that it's crucial to try to keep the framerate at or above the value specified (more details below), and Force10Level9 sounds like it forces DWM to use DirectX 9. I'm fairly certain about the former, not as certain about the latter, but together they do wonders.
You can view the fix below. You can then save it as a .reg file and import it into your registry. Restart the Desktop Window Manager service or reboot to see the changes.
Fix: http://pastebin.com/FFDbubw9
Undo: http://pastebin.com/zA8CJY06
(P.S. Just ran a FurMark test between fix applied and no fix. No difference in performance, with an inactive secondary monitor. I also noticed no difference in Physical Memory usage as reported by Task Manager. YMMV, let me know if you have any side effects.)
(P.P.S. The screen fade that happens when you log in/out is just as choppy as before (or if it wasn't choppy for you, that shouldn't have changed). Oh well, how often do we see that thing, anyway? :))
By the way, it appears 10Level9 is Windows 7's emulation platform for running DX10 on DX9 hardware. It's reported to be at least a 0.5x performance hit, so it's surprising that it actually makes Aero run better. If this article is anything to go by, Force10Level9 makes Aero run exactly the same as it does with older WDDM 1.0-only drivers like 182.50: http://www.techarp.com/showarticle.aspx?artno=637&pgno=1
The long version:
Well... I was able to do one more thing.
There is an undocumented registry key which allows you to fine-tune the Desktop Window Manager's scheduling. Unfortunately, all of its values seem to be defunct in the final version of Windows 7 we all use today... except one: FrameRateMin.
From what I gather, the Desktop Window Manager (Aero) carefully monitors the framerate it is able to achieve, and when it can't measure up to its own expectations, it will perform a "step down", or framerate reduction, and maintain this lower framerate for a given period of time (at one time specifiable with a registry value) before trying again at maximum speed.
I presume it does all this to keep things looking "smooth".
The problem is, in most cases, it doesn't help, and actually prolongs the stuttering duration. By "in most cases", I mean in every case it's happened in my personal usage of my Windows 7 computers.
So what helped me was setting this FrameRateMin value to 60. That way, the Desktop Window Manager considers anything under 60fps to be unacceptable and will not remain at a lower framerate for purposes of perceived smoothness. Thus, the stuttering will take up as little time as possible, making it nearly unnoticeable most of the time.
Keep in mind DWM shouldn't be having performance problems to begin with, but apparently in some cases, like with my particular hardware (desktop and laptop) and the latest NVIDIA drivers, it does.
Down to brass tacks. The registry key is HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\DWM\Schedule. The value is FrameRateMin, a DWORD representing the minimum framerate DWM will consider as acceptable. I set it to 60, but you can set it to whatever you want.
To repeat, this WILL NOT prevent Aero from ever getting below the framerate you specify; it simply prevents Aero from retaining a lower framerate after a stutter in order to give the illusion of smoothness (an illusion which fails).
I imagine the main reason it fails so spectacularly in my usage is because I watch a lot of videos which play back at 24fps. Such a framerate plays back terribly with a 30Hz refresh rate, which is what Aero would reduce itself to for extended lengths of time. Now, performance hiccups are minimal, but sadly still existent.
So this isn't a solution, but it does help. I am still uncertain of where the problem lies, considering GPU-Z shows graphics card loads to be as low as always when it's happening.
Oh, and I found one more registry value. This one is far more important. :) It solves the problem for me entirely, from what I can tell.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Avalon.Graphics
add the DWORD value Force10Level9 with a value of 1.
I haven't noticed any side effects, just smooth performance.
Apply these tweaks at your own risk!

Problems setting up dual monitors

I am having problems setting up dual monitors on a band new HP envy 700 using windows 8. I just bought this computer and bought DVI to via adapters to use. Everything is hooked up but nothing is happening on the 2nd monitor. Help!

Jaimetech3, welcome to the forum.
When requesting help you should always include the make/model (i.e. p6-xxxx) of the computer and/or monitor. This information is necessary for us to review the specifications of them.
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HP TouchPad - 1.2 GHz; 1 GB memory; 32 GB storage; WebOS/CyanogenMod 11(Kit Kat)
HP 10 Plus; Android-Kit Kat; 1.0 GHz Allwinner A31 ARM Cortex A7 Quad Core Processor ; 2GB RAM Memory Long: 2 GB DDR3L SDRAM (1600MHz); 16GB disable eMMC 16GB v4.51
HP Omen; i7-4710QH; 8 GB memory; 256 GB San Disk SSD; Win 8.1
HP Photosmart 7520 AIO
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Problems centralizing windows on dual monitor

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