External Display Changing Preferences

Since I upgraded to Snow Leopard I am having troubles with my Samsung SyncMaster 2333. Sometimes when I start up it recognizes the monitor and all is good. Other times, especially after sleep is just says it is an unknown VGA monitor. When is stays the latter I cannot get the correct resolution for my monitor.
The strange thing is that the background image that comes up with it recognizes SyncMaster is different than the one when it is an unknown VGA monitor. It's like there are two sets of preferences in there and it pulls them up willy-nilly. Any advice?

Because the new OS is checking the connected monitor's EDID information all the time and
your KVM switch did not feed and can not feed the EDID information correctly. 
Please find a EDID emulator and place between your Macbook Pro and the KVM switch.
or You can simply upgrade your KVM switch to which support "Full-time" EDID DDC communication.

Similar Messages

  • Disconnecting from external display changes background, disconnect server shares, inactivates desktop icons.

    I have a user working on a MacBook Pro, Lion OS X 10.8.2, connected to an external display. When disconnecting from the external display the background picture changes, he can’t open documents saved to desktop, and the connection to the server shares is lost.  Rebooting does not resolve the issue while it is disconnected from the external display.  If he reconnects the MacBook back to the external monitor sometimes he has to reboot to get everything back to normal.  It almost seems like it is logging him into a different account or profile or something like that (please excuse my messy terminology as most of our users are still using PCs).  However if you look at what account is logged in, it is still the same account that he logged in with that morning.  The Mac is not authenticating to the network, just connecting to server shares.  Has anyone experienced this issue before and if so is there a fix for it?

    The Mac has a long history of assuming that ANY adapter still present means the display is still present -- you need to remove the adapter as well as the cable, if present.
    So my theory articulated above is that the disconnect is not registered correctly. This would mean that the second display is still seen as present. You could check this by invoking:
    System Preferences > Displays ...
    and looking for the Arrange pane (shown above) which is ONLY present when multiple displays are attached. More detailed information can be found in About this Mac  > ( More info ) Graphics & Displays ...
    ... specifically the NAME of each attached display is shown or an indication (no display connected):
    ATI Radeon HD 4870:
      Chipset Model:          ATI Radeon HD 4870
      Type:          GPU
      Bus:          PCIe
      Slot:          Slot-1
      PCIe Lane Width:          x16
      VRAM (Total):          512 MB
      Vendor:          ATI (0x1002)
      Device ID:          0x9440
      Revision ID:          0x0000
      ROM Revision:          113-B7710C-176
      EFI Driver Version:          01.00.318
      Displays:
    Cinema HD:
      Resolution:          2560 x 1600
      Pixel Depth:          32-Bit Color (ARGB8888)
      Display Serial Number:          CY8360UFXMP
      Main Display:          Yes
      Mirror:          Off
      Online:          Yes
      Rotation:          Supported
    Display Connector:
      Status:          No Display Connected

  • How to change external display resolution WITHOUT clicking "CONFIRM"?

    I have a somewhat unusual situation. My MacBook laptop is actually now a ModBook (a pen-tablet computer), and as such I no longer have a trackpad attached to it. All of my inputs are via the stylus, tapping directly on the built-in display.
    This works perfectly fine, except when I need to give presentations on an LCD projector (which is quite often lately). I like to use the projector as an external monitor, so that I can run the Keynote presentation on it while using my laptop screen as the presenter's display, with the upcoming slide, etc. If the projector doesn't give me an ideal native display option (sometimes, the aspect ratio for the  3 or 4 resolutions available in the Displays drop-down in the menubar turn out to be stretched or squeezed), then I, naturally, have to open the Display System Preferences and try out different resolutions.
    The problem is, since my stylus only interacts by clicking directly on the built-in-display, I have no way of moving the cursor over to the external display when the dialog box with the "Click here to confirm change/You have 15 seconds..." message appears. So I can never click it ... so I can never confirm the new settings.
    The workarounds I've used so far are:
    - Mirror displays (not ideal, as I need the presenter preview of the next slide)
    - borrow a mouse from someone (usually from a Windows desktop, frankly) and plug that in to briefly mouse over and click the confirm button
    I'd love to find a software workaround that allows me to NOT mirror displays and also doesn't require me to carry around a mouse all the time (my laptop bag is already overstuffed...).
    Thanks.

    Fateh wrote:
    I hope that my question is clear ... Nope.
    How to change the display resolution of APEX ??APEX doesn't have a display resolution. "Display resolution" is an attribute of the device and user agent software used to view the APEX page.
    What do you mean by "the display resolution of APEX"?
    In other word, if an end user sees large elements on a pageWhat "large elements"?
    then he/she zooms it outHow?
    "Zooms" what—the entire page or a single "large element"?
    How can I set a proper ZOOM for my app by default ...Meaning what?
    And as usual, we're missing:
    <li>Full APEX version
    <li>Full DB/version/edition/host OS
    <li>Web server architecture (EPG, OHS or APEX listener/host OS)
    <li>Browser(s) and version(s) used
    <li>Theme
    <li>Template(s)
    <li>Region/item type(s)
    You've been posting here for years. You know this basic information is necessary to understand and reproduce problems.
    If you're looking for help it doesn't seem unreasonable that you make the effort to provide a full, clear but concise description of the problem or requirement.

  • External display resolution changes after returning from display sleep

    I often use an external display as a second screen with my Macbook Pro (OS X 10.8.2)  However, when I return to the computer after the display has gone to sleep, the external display resolution changes when the display reappears.  Then I have to go into System Preferences > Display and "Detect Displays" in order to return the external display to the proper resolution.
    Does anybody know of a way for me to avoid having to do this every time my display sleeps?
    Thank you,
    Adam

    I have the exact same problem.
    I found the key combination ⌘ alt F2 also restores the proper resolution on both displays, however it's still a bit annoying

  • Itunes cannot locate my files on the external hard drive - I changed preferences but still not locating songs?

    itunes cannot locate my files on the external hard drive - I changed preferences but still not locating songs?

    This work for the most part:
    https://discussions.apple.com/message/20361846#20361846

  • Change settings for external displays: no "mirror displays" mode

    Hello,
    I'm using a 13" MBP with Snow Leopard. I'm using different displays and projectors in different locations. When you plug an external display in, the two displays are first in "mirror displays" mode. First thing I do is to switch this off.
    Is there any way of changing the settings, so that an external display doesn't start in the synchronized mode??
    Thanks in advance.
    Message was edited by: robert170

    only if you plug in this projector again. If you plug in a new projector (which I often do) it allways starts in "mirrored" mode.
    I just found an app which - at least - makes the switching easier:
    http://www.fabiancanas.com/Projects/MirrorDisplays/
    Message was edited by: robert170

  • Cannot change display resolution when connected to external display

    On my 2.0GHz 13" MacBook, I have no problem with the display resolution when connecting to external display/projector when I am running in Mac OS, everything work perfectly! But things start to get messy when I am running in Windows VISTA 32 (installed within the Boot Camp 2.1). Whenever I connect to any external display/projector via a MiniDisplay-to-VGA cable, the resolutions on both my MacBook LCD and external display/projector drop to 640x480. And i am not able increase the resolution in the Display Settings. Does this mean that I have not installed the latest version of display drivers? Or is it that Apple did not provide the VISTA 32 drivers (in Boot Camp 2.1) that is compatible with the Mini Display port.

    Cool!
    I'm glad you have it fixed.
    Please resolve the thread so others can find your answer faster.
    Thanks,
    Bifocals
    Click Accept as Solution for posts that have solved your issue(s)!
    Be sure to click Like! for those who have helped you.
    Install BlackBerry Protect it's a free application designed to help find your lost BlackBerry smartphone, and keep the information on it secure.

  • Connecting a MacBook to an external display or projector

    I have tried to connect my MacBook to a projector and to a TV using the mini-DVI to Video adapter, both with the same poor results. Here's the steps I took:
    - Turned on the TV
    - Connected the video cable to the TV "video in"
    - Connected the video cable to the MacBook with the mini-DVI to vieo adapter
    - Opened the MacBook
    - Turned it on
    The MacBook boots up, the MacBook resolution changes and the video on the TV is distorted, showing essentially three images of the MacBook display. Any attempt to adjust the resolution using system preferences just makes it worse.
    Has anyone had success using a MacBook for presentations using either a TV or a projector and, if so, what procedure do you use to connect?

    Greetings from Hong Kong-
    I have a major presentation to give in a couple of days and have NOT been successful connecting to an external display. I am starting to freak out. Any instructions would be helpful!

  • External display - maximum resolution only works in safe mode on MBP

    I'm having an issue with an external display connected to a 2012 non-retina MacbookPro 15" i7 running 10.9.  Monitor is Dell U2713HM, which has a maximum resolution of 2560x1440, and is connected via a Mini-Dipslayport to Displayport cord.
    My setup has been working great for over a year, where while at my office I use the macbook closed in "clamshell mode" with the Dell monitor being the only display in use, running at 2560x1440.  However today when I came into my office and connected to the dispay as usual, the resolution on the Dell was noticably scaled.  System preferences is showing it running Scaled at 1080p, and when I select Best for Display it stretches to a very wide and distorted resolution.  I can hold alt and click the Scaled button to display additional resolutions, however the maximum resolution listed is 1600x1200.  Same problem regardless of clamshell, mirror, or extended desktop modes.
    I've been trying to track down the problem, and have run though the usual procedures: restart, shutdown, reset PRAM, reset SMC, check cord connections, verify disk, repair disk permissions - all to no avail.  However when I boot in safe mode the display runs as it should at 2560x1440 without issue, which lets me know its not a problem with the cord or connectioin, but rather something on the OS / GPU side.
    I can't for the life of me figure out what is causing the issue.  Considering its been working fine for quite some time, and I've made no unusual changes to the MBP in the past 48 hours when the display was working properly, I'm not really sure where to go from here.   Hoping to not have to migrate to a new user or repartion my HDD.
    Any suggestions on possible solutions?
    Thanks.

    I stumbled upon a fix.  Still not sure what caused the issue in the first place, but for anyone having the same issue, the display override script contained on the site below seems to have fixed the issue.
    http://embdev.net/topic/284710

  • Missing external display 1920x1080 resolution, only shows 1680x1050... Please HELP !

    When connecting my Macbook Air (mid 2011) to an external LG 22" Display (M2241A) which supports a native resolution of 1920x1080, the closest setting available in the display preferences is 1680x1050, and aspect ratio is really distorted at this size. I use an Apple mini-display-port to HDMI, and HDMI cable to connect the Monitor.
    What can I do to correct this problem ? How do I make the 1920x1080 available and get rid of the distortion ?

    Thanks for your quick answer, but... When I use the 1080p resolution, I need to use Underscan, and the colors change, the fonts get all blurry and overall definition goes really bad. Really seems like a TV setting.
    Maybe okay to watch a movie, but not to work in Photoshop and get design work done properly.
    The external display only has HDMI + VGA inputs.
    So I guess the next step is to try finding a different connector (mini-display to VGA) But I am now in Chile, Patagonia, and believe me, this will be quite a challenge to find !!! Also, no way to buy at Apple online store and get it shipped here in Chile... :-(((

  • External Display not working (descriptive details in post)

    Hello
    Background:
    I have been using a black Macbook (last year's model - before the aluminum ones came out) and connecting it to a VIZIO VW22L HDTV10T (television/monitor) via a mini-DVI to VGA adapter.
    This setup always worked, although it was a bit finicky (I'd have to plug it in before closing the display to get in to work in clamshell mode, for example). I get the feeling from reading other forum posts that this is the normal case, though (which so far has been my only real gripe with OS X).
    Anyway, back a couple months ago I wondered if this finicky-ness was partially caused by a messed-up preference file, so I decided to try and fix this. In the ensuing tweaking, I somehow caused my Display preferences to disappear.
    After much effort trying to fix the problem, I eventually called Apple support, which ultimately recommended that I reinstall OS X. I didn't do that, and continued to work at the problem. I eventually was able to bring it back by going into my Time Machine backups and restoring all the Display preference files (I used old preferences from back when I got the external HD, so I knew they'd be "uncorrupted). However, now I'm having problems with my external display, namely that it is not working.
    This problem started early this year, so it might have been caused by the 10.5.5 update, but since I had all these other problems going on, I'm not sure if that was the case.
    Problem:
    The Macbook doesn't seem to recognize the display, or is having problems routing video to the display, or something.
    If I plug the display into the Macbook while it is running normally, the Macbook LCD will flash blue (like it picked up a new display), but them come back to normal. The monitor will go out of sleep mode for a second, but then display a "No signal" message. If I attempt to "Detect Displays" the Macbook screen will either flash blue (as before) or just do nothing.
    If I have the display plugged in when I start up the Macbook, everything will proceed as normal until the time the desktop would be displayed. Instead of this, I just see a blue screen (like some generic desktop before any background is applied). The menu bar, the dock, and icons do not show up. However, I can hear various audio cues telling me the computer is running fine except for htis problem (email notifier going off, etc.).
    I know the problem is not faulty hardware, because when I boot my Macbook into Windows, everything works perfectly. It therefore follows that it is an OS X problem. I downloaded both Cocktail and Applejack and run various repairs on them (most notable repairing preferences), but nothing has changed.
    Any suggestions about how to try fixing this? If there's any technical detail I've missed, let me know.
    Thank you in advance to everyone who tries to help.
    -Richard

    I have same problem. MacBook Pro (new, 2014) upgraded to Yosemite. Had been running with ViewPoint high-resolution, 27" monitor, HDMI. I tried Thunderbolt connection -- it connected, but it would not allow the external monitor to run at its native resolution (2560x1440). It would only display properly using HDMI. Just 3 days ago after I installed the latest OSx software update, and my external monitor problems started. On startup, my MacBook screen flickers non-stop. I can fix problem eventually (after several tries) by disconnecting the HDMI cable, turning OFF the external monitor power, turning external monitor back ON and then plugging in the HDMI to my MacBook Pro. This is very inconvenient.
    I will try using the Thunderbolt cable. When I tried it in the past, it connected, but it wouldn't display the native resolution of my external monitor (which is 2560x1440). Can only get this resolution now with HDMI.

  • External display problems with snow leopard

    I just upgraded from Leopard to Snow Leopard on my Macbook and it's created lots of problems with my LCD external display:
    - The display won't work at its native resolution (1680x1050) - it will flash up an image for 1/10 of second and then go black. I can only get it to work at a lower resolution, which looks AWFUL.
    - If I try to start up my Macbook with the lid closed and the display connected, the display won't work at all (it jams on the start up screen). It only works if I keep both of them running
    I never had these problems when using Leopard. I've searched lots of forums and found that many people are having similar problems with external displays. Apple still haven't fixed the bug after repeated efforts from people to get if fixed.
    Here are some threads (now closed) on this if you're looking for solutions:
    http://discussions.apple.com/thread.jspa?threadID=2132912&tstart=0
    http://discussions.apple.com/thread.jspa?threadID=2136455&tstart=1
    http://discussions.apple.com/thread.jspa?threadID=2132837&tstart=0
    http://discussions.apple.com/thread.jspa?messageID=10084332
    Common suggested fixes are:
    - Force OS X to use LCD font smoothing (does not work for me)
    - Clear the PRAM on start-up (does not work for me)
    - Delete /Library/Preferences/com.apple.windowserver.plist (does not work)
    - Change energy management setting to high performance (only works on graphics cards in Macbook 15" and 17").
    From reading these forums it appears that this is a well-know bug. Has anyone else got any suggestions to fix this? And why hasn't Apple fixed this yet after so many people bringing it to their attention? It's clearly a bug that wasn't in Leopard.

    I'M FED UP WITH APPLE! They've always been a little shady, but the last half of 2010 took the cake!
    First it was the iPhone 3g "upgrade" to IOS4 which was garbage and killed my ability to use the 3g until I figured out how to crack the software, wipe the thing clear then reinstall the original software. Next up was purchasing the iphone 4 as a Christmas gift for someone running tiger on their mac, only to find out that the iphone 4 doesn't work on tiger when they tried to sync their contacts - and then having to rush out and purchase snow leopard so that they could enjoy my gift. Then I install Snow Leopard (note - I purchased the family pack) onto my own leopard-running(10.5.+) powerbook only to have the external LCD display I've been using for years suddenly stop working.
    Oh, okay, to be fair, it works IF I RESIGN MYSELF TO SET it to "mirror image" (which defeats the purpose of having multiple displays) and drop the resolution down to a pathetic, unsharp, nearly distored setting that is almost painful to look at knowing that this monitor was just A COUPLE OF DAYS AGO showing me crystal clear images.
    Then I exhaust myself trying to find a fix only to discover that APPLE in their infinite brilliance (AKA - their torture of loyal customers) knows of the issue - worked it out - then created an update that created the issue all over again. I'm so done! No more macs. I'm going back to the evil land of PCs. At least there, you know you're getting crap, it doesn't sneak up on you after getting you to trust it time and time again.

  • Using a TV as an external display

    I bought a Vizio 28" TV to use as an external display, but the best resolution is only 1360 x 768, which makes everything on the screen very large, and negates the reason for upgrading from an Acer 23" monitor to the Vizio 28" TV.
    Is the problem my graphics card, or will a TV with a higher resolution work? There is a Samsung 32" TV which offers a 1920 x 1080 full HDMI resolution. I would have to get an HDMI adapter to use it, but that is no problem. What I wonder is if that would do the trick so that everything on the screen isn't way toooooo big. The cost of a TV is so much less than a comparable size computer display, and I don't do work that needs the equivalent of a retina display.
    My husband has a late 2011 MacBook Pro and is using a 32" Elements TV as his display, and he does not have this problem. Perhaps the difference is graphics cards is the reason. My System Preferences Display does not have the Optimize For dialogue box, as he does on both his external ELEFW328 and his internal display, so I cannot change the resolution of my Vizio external display. Would appreciate any thoughts you have.

    Hi
    I don't know about your problem, sorry. How about asking in the Macbook Pro Forum, they may know something.
    Steve

  • Two BenQ external displays not working with new 27" iMac

    I have a 27" iMac (newest model) and have been using it with a BenQ BL2710 monitor.  It's connected with a mini display port to display port cable.  It's been working great; I found that I had to uncheck the 'Displays have separate spaces' box in Mission Control, so I have the menu bar on the iMac'd display only.
    Now, I have a 2nd BenQ BL2710 that I'm trying to hook up the same way, using the iMac's 2nd thunderbolt port.  The display powers up and all 3 screens look perfect.  The problem is getting the arrangement correct.  I have the dock on one display, the menu bar on another, and the mouse will only work on one or two of the displays, depending on how I change the arrangement.
    I want the dock and the menu bar to be on the iMac's display ply, which is in the center.  Is there a trick to getting this done, or do I need a third party dock or other piece of hardware to get it to work?

    I just answered my own question; apparently with two external displays connected, the dock has to be positioned on the bottom.  I had it on the right of the main iMac display.  Moving it to the bottom, and rearranging the position of the monitors in display preferences did the trick.
    If anyone knows of a way to accomplish this without moving the dock to the bottom of the screen, I'd be interested.  I'd prefer it on the right side, if possible.

  • External display's brightness can no longer be controlled with external keyboard in 10.8.2

    I can no longer control external display's brightness with external keyboard.
    Until now my external keyboard controlled external display's brightness and MBPr's keyboard MBPr's brightness. Now the only way of changing external display's brightness is via Display preferences which is cumbersome
    Is there any way of going to pre 10.8.2 settings?

    I noticed that the keyboard and tablet were'nt working when plugged into a usb hub or monitor usb port.  I had to plug in the keyboard and tablet into a mbp usb port where they worked.  For some reason, after plugging them back into the usb hub they worked again.  Could just be dumb luck though.

Maybe you are looking for