Display Changes Resolution When Computer Wakes From Sleep

I have a MacBook Pro bought in May of 2006. In the last year, this problem has been getting progressively more annoying to me. When the computer wakes from sleep (not every time, but most of the time) the screen will flash blue, then reset the resolution to 640 x 480, I think. To fix it, all I have to do is go to System Preferences and change the resolution, but when I do that, it pops up two windows, like it thinks I have a dual display set up. To fix this, I always click 'detect displays,' and it fixes it, but the next time I wake the computer from sleep, it does it again. This isn't really an urgent problem, but I would expect my computer to behave a bit better for me.
Thank you in advance for any aid you might give me.
Lisel

Hi Lisel. I have a similar age MacBookPro that does the same thing. I don't really know how to fix it I'm sorry, I wish I did cause it's annoying. I just thought I'd let you know you're not the only one with this issue.
Basically, for some reason it thinks it has two displays connected, even when there isn't. To stop it being a total pain, make sure when it does come up with the two Display Pref windows to set them both to 1440x900, at least then when it does go dual display it won't be 640x480 and you can still read stuff.
I've also left the Display Pref icon on the top tool bar (next to the AirPort and Bluetooth and stuff), so I can just click that and Detect Displays. When it does that it figures out for itself it doesn't actually have two displays connected and so goes back to normal.
I know that's a workaround and not a fix, sorry. I'd be keen to know if anyone else has any better solutions:)
Thanks,
Mark.

Similar Messages

  • Screen flickers when computer wakes from sleep

    O.k., so I also had this problem when I updated to 10.6.8, but it's still here in Lion.........
    When the computer wakes from sleep, I get a single flicker along the bottom 1/3rd of the screen, then everything's o.k.
    It's just annoying, that's all. I've backed out to 10.6.7 on 3 occasions, and the flicker disappears.
    Anyone else having this issue?
    I'm running a 2010 Quad-core Mac Pro with SSD and 27" Display.
    Bob.

    Update:
    I've now been to the local Apple store, and tried their display Mac Pro/27" Cinema Display combo, and guess what.......the screen flickers on wake-up.
    I asked the guy in the store about it, and he says "oh yes, I see that. No-one has noticed that before, I wonder if mine does it at home".
    I tried the Mac Mini with 27" Cinema display, and the 27" iMacs, and they were o.k. (no flicker).
    So, this only affects Mac Pro's running 2560 x 1440 resolution.
    I've booked another call with Apple Support. No doubt they'll still tell me to take my computer in for testing, even though I've shown they all do it (the guy in the Apple shop suggested that, even though I demonstrated the flicker to him on the one in the shop).
    I wonder how long this will take to get a software fix? Problem is, the Pro is not mass-market (like Macbooks and iMacs), so it may take an awful long time.
    In the meantime, I'm sticking with 10.6.7.
    Bob.

  • Audio volume low when computer wakes from sleep - os x yosemite

    I've been having an issue ever since I upgraded to OS X Yosemite, where the audio volume coming out of my external speakers is extremely low after I wake my computer up from sleep.  The only resolution I have found is restarting the computer.  Once I do that, the audio volume is great.  If I were to boot up my computer after it has been completely shut down, the audio volume is also great.  The issue only occurs after sleep.  Anyone else having a similar issue?  Is there another fix besides restarting the computer?
    Speakers: Bose Companion 2 Series II (these are wired, not bluetooth)
    Computer: Mac Pro - late 2013 - running Yosemite

    This is a BUG.  It has been submitted to engineering many times - unfortunately Apple has not done anything about it.   We have 5 Mac Pros,  all 5 do the same thing after updating to Yosemite.   The  PRAM / SMC reset is useless -  we even  installed a fresh  OS on one of the machines (a suggestion of the level 2 Apple tech)  same problem.   Clearly this is a system level bug.   Only way to get it resolved is to keep pounding the bug report site with requests.     The squeaky wheel gets the oil.   The problem is 100% repeatable on the machines that exhibit the bug.
    In the mean time  set up an applescript with this command and it will reset the sound - do not include the brackets :
    <do shell script "sudo killall coreaudiod" with administrator privileges>
    Run it every time you wake from sleep and you won't have to deal with the problem ever again.   
    Pretty lame that Apple has not fixed it even though the problem appears to be pretty widespread.  

  • 10.4.7 kernel_task eats 70% of CPU only when computer wakes from sleep.

    On my machine (FW 800), 10.4.7 caused: machine to slow perceptably after wake from sleep. Activity Monitor tells me kernel_task is consuming hundreds of times it's normal CPU cycles.
    I installed a FRESH 10.4. Imported my files and folders. Upgraded all the Apple software EXCEPT 10.4.7 combo updater. The partition worked fine, before and after sleep. Upgraded using the 10.4.7 combo updates.
    Again, kernel_task consumes 60-70% of CPU cycles after my Mac wakes from sleep. Note that it works fine when first rebooted.
    As slow as it was, it was unusable. I reverted to 10.4.6 to get work done.

    I have the very same problem on the same platform, except that I have 2 int. bootable disk drives. One boots 10.4.6 and has no problems at all. The other Boots 10.4.7 and operates perfectly, as far as I can tell from a few hours of use. It will continue to work just fine until I put it to sleep. On awakening, the Kernal Tasks CPU Usage jumps to 55% - 75% and does not decrease any further (ever). Restart or Shutdown restores perfect operation after reboot (but don't let him fall asleep).
    I have repeated this dozens of times, with identical results.
    The update was performed by the book. External devices disconnected, permissions repaired, disk verified by Disk Util. and DiskWarrior and the 10.4.7 combined update was used. Permissions and Drive Verif. was repeated after sucessful install. In my case, no other apps were effected. No Sys Errors were logged, No crash events, no Kernel Panics.
    There are thousands of Sys Config combinations involving both hardware and sotware. This looks like a flawed release on this hardware. "Updater Beware", especially the first month after a major release like this. Look for a fix very soon.
    Even so, the people at Apple have done extremely well over the last few years.
    I know, because I work with a dozen or more Generic PCs and there has never been a trouble free update from the other side.
    Having a second internal hard disk with identical OS and applications is like having a second computer in the same case. It is also a good idea to use backup software to auto-sync your user files in realtime. You can boot from one while repairing the other etc.

  • HT1338 why do i lose wi-fi internet connection on iMac when computer wakes from sleep

    Everytime my imac wakes from sleep I lose internet connection and have to go into network and reconnect.  I am using OS X Mountain Lion software.  Please help!

    You might try looking at these Apple support articles:
    http://support.apple.com/kb/PH11099
    http://support.apple.com/kb/PH10662 - very simple suggestions only
    Here is another thread with a suggestion:
    https://discussions.apple.com/message/18848093#18848093
    You also might want to consider filing a feedback report. A lot of people are having similiar problems:
    http://www.apple.com/feedback/
    If you monitor the "More Like This" box (top right), other threads appear. Opening them usually displays other threads.

  • Firewire dismounts when computer wakes from sleep

    I have a G-Drive mini hooked up via the firewire 800 port on my MacBook Pro (early 2011 - 13 inch). The drive is directly connected to the laptop but serves also as a pass through for two other firewire drives (non G-Tech). I usually only have the one G-Drive turned and turn on the other drives only when I need them.
    The issue seems to be that when I wake my computer from sleep the drive will disconnect itself. I get the dialogue warning of ejecting a drive improperly and then have to shut off the drive and turn it back on for it to mount again. When I shut off the drive in this conidtion I get the standard spinning drive beep sound that tells me it was not meant to be turned off that way... So I assume that the computer or the drive are not communicating properly when the drive is connected and the computer goes to sleep.
    Answers to inevitalbe questions: The drive is not hooked up to an external power source -- I have not tested the issue with a different or powered firewire drive -- I have not noticed the issue when all drives are connected via daisy chain -- None of my USB ports seem to be effected (knock on digital wood) -- The only application that is ever left open that may need to access the drive when I leave my computer and it goes to sleep is iTunes
    Issues within issues: This does not always happen, but it seems to have been happening a lot more often.
    Running Mac OSX 10.6.8
    Currently using iTunes version 10.5 (although I highly doubt this has anything to do with the issue at hand)
    If anyone has any insight on the problem, a fix or even if the issue is known or being ignored I would greatly appreciate the knowledge.

    UPDATE:
    I have started to turn off Bluetooth at night before I put my computer to sleep. I HAVE NOT HAD THE FIREWIRE RANDOM DISMOUNT PROBLEM SINCE. I do not know if this is a freak coincidence -- but so far, so much the better for my firewire drive.
    Hope this helps someone else down the line... eh hem...

  • Program starts when computer wakes from sleep

    I have recently found that when I wake my machine from sleep, my scanner program starts up (HP Scan Pro). I can't figure out why or when this started to happen. I have looked in the application preferences to see if some setting could be affecting this. But alas, I don't see anything.
    Any thoughts?

    What program launches?
    There are many locations for startup items, kernel extensions etc.
    /System/Library/StartupItems
    /Library/StartupItems/
    /Library/LaunchAgents
    /Library/LaunchDaemons
    ~/Library/LaunchAgents
    .. or System Preferences -> Accounts -> Login Items
    Some printers may act like cameras and launch the default program in Image Capture. To check for this:
    Go to Image Capture, select your device on the left and there will be a default program option (don't remember exactly what it is labelled as).

  • Javascript (in Firefox 3) takes several minutes to start working when computer wakes from sleep, Mac OSX 10.5.8

    Whenever I wake my Mac from sleep, with Firefox having been left running, some parts of Firefox take several minutes to start working again. These include switching between open tabs and any website functionality that uses javascript, eg gmail. This has gone on through many updates of Firefox. If I quit Firefox immediately on waking the Mac and restart it, everything is OK.

    The following worked for me:
    http://support.mozilla.com/en-US/questions/684867
    "Problem: I had the same problem but with mac osx 10.5.8, Firefox 3.6.6 sometimes prints and sometimes does not, but the preview was always blank and I could not save to pdf file.
    Solution: I downloaded Firefox 3.5.10, installed it on my desktop and opened it, tried print preview and it worked, quit Firefox 3.5.10 and ran 3.6.6 and voila! print preview is working fine and I can save to pdf fine.
    I guess running 3.5.10 fixes the profile in a certain way. I have no idea how that happened but it worked."

  • Wireless connection goes "stale" when computer wakes from sleep

    I have a Airport Express serving as a WPA2 wifi base station to my Macbook Pro. I set everything up so that I can get on my wifi network. Everything works fine. But then if I sleep my Macbook Pro and then wake it, the menu bar indicates that I'm connected to my wifi network, but if I try to hit any webpage or do "ping yahoo.com" from the command line, it just hangs or spins forever. To fix this, I have to unplug and replug the Ethernet line going into my Airport Express, and then turn off and then back on my Airport connectivity on my Macbook Pro. This is what it takes to get the wifi to work properly again. Does anyone know what's going on and how I can fix this?

    System Preferences>Network>Advanced>Airport. Make sure your network is at the top of the list. Delete extraneous networks from the list. Check the box, "Remember networks this computer has joined."

  • Static on monitor when computer wakes from sleep

    When the mac mini comes out of sleep mode, the screen is scrambled as if you are watching a TV station with no signal. There seems to be a wide spread problem with the mac mini. Is there a fix for this?
    Also, I read that the mini is HD. It is currently connected to a Samsung Synmaster 2333HD 23'' monitor. Is there something that needs to be done to have the output become HD?

    You might try looking at these Apple support articles:
    http://support.apple.com/kb/PH11099
    http://support.apple.com/kb/PH10662 - very simple suggestions only
    Here is another thread with a suggestion:
    https://discussions.apple.com/message/18848093#18848093
    You also might want to consider filing a feedback report. A lot of people are having similiar problems:
    http://www.apple.com/feedback/
    If you monitor the "More Like This" box (top right), other threads appear. Opening them usually displays other threads.

  • Browser window is minimized when computer wakes from sleep, needs to be mazimized two times to restore a window as large as the screen

    i have tried to use the reset feature, but it doesn't work
    i cannot a feature such as the one available on
    AOL that allows the "screen size and position" to be saved

    Operating system is Windows 7 x64. Firefox Version is 20.0.1
    Note: my problem has stopped since I manually enlarged (instead of using the enlarge button) the Firefox window to fill the screen

  • Computer Wakes From Sleep

    My computer wakes from sleep (MBP 10.6.4). At the time my computer wakes (not exactly sure of this), a message in the Console reads "Focus[143] Screen parameters schanged". When I open the lid, the keyboard is lit-up, the screen is blank and the is no prompt for logging in. I have to hit escape, close the lid, wait until I see the computer sleeping, open the lid, then I can log in. I have a program on my Mac called Focus, could this be the culprit or is it something in the OS itself? Many times when this has happened, my computer fans are screaming and the computer is very hot. I have been eliminating many bugs from my system but this is one I need some help with. Thanks.

    Focus certainly sounds like it could be the culprit. I would remove it from your account login items an test to see. You do this in System Preferences>accounts>login items tab. You'll have to unlock the preferences and enter your admin password and then select Focus in the list and hit the "-" button below the list.
    The only other things I can think of are a bluetooth device waking your system or "wake on network access".

  • VNC - Screen Resolution Problem on Wake from Sleep

    My question: When it either wakes from sleep or cold boots (NOT on restart for some reason), Mac OS X seems to be confused on the previous resolution of my screen. On wake or cold boot, my main screen SOMETIMES gets set for 800x600 at 56 Hz, according to the display preference pane. I normally run at 1152x870 at 75 Hz. In the past, I have just used the "Detect Displays" command from the display preference pane. This always fixes the screen resolution and restores it to the correct setting.
    This would not be a problem if I didn't have to run VNC. These screen res changes are crashing my VNC server. Here's what I do. I run a VNC server (OSXvnc is the name). I go away. Machine goes to sleep. From machine 'x' I send a wake-on-wan packet (a pain in the butt to figure out for me, BTW). My VNC Machine wakes up. I know it's awake, because I can login to it from remote, using SSH. But the screen res problem happened, and OSXvnc shuts down and won't reinitialize automatically. It says "Screen Resolution Changed - Server Reinitialized", and the "Start Server" button is waiting to be pressed. Of course, this cripples my ability to use VNC.
    For what it's worth, this problem has happened with two different video cards. Granted, the first card was an ATI Radeon 9000 with 64 MB or VRAM and the second card is the same model with 128 MB VRAM. It's virtually the same card, but still, that's two different cards.
    I have 2 CRT displays connected thru adapters (DVI-VGA and ADC-VGA) to the ATI. I'm running all the latest updates for Panther, according to Software Update. This problem has been with me since 10.2.3. I lived with it until it started really getting in the way (VNC crippling & such).
    Any thoughts? -- iJW
    G4 Dual 1 GHz MDD (no FW 800)   Mac OS X (10.3.9)  

    One other item I just discovered. It seems that whether or not my monitors are powered on has something to do with it. When my monitors are on, the problem doesn't happen.
    I like turning them off to save electricity. If I'm using the computer remotely, I already have a monitor. I don't need one powering up at my home that no one's looking at anyway. So the question still stands...
    Anyone?
    G4 Dual 1 GHz MDD (no FW 800)   Mac OS X (10.3.9)  

  • IPod 4G always mounts for disk use when Mac wakes from sleep

    My 4G iPod is always mounting for disk use when my Mac (10.4.8, Dual 1.8 GHz G5) wakes from sleep, even though the settings for the iPod has "enable disk use" unselected. When I launch iTunes (latest version) the iPod promptly is unmounted. I have restored factory settings, I have reinstalled the computer's OS and iTunes with it.
    What is going on and how can I make it normal?
    Dual 1.8 GHz G5   Mac OS X (10.4.8)   iTunes 7.1, iPod 4G 20GB

    UPDATE:
    I have started to turn off Bluetooth at night before I put my computer to sleep. I HAVE NOT HAD THE FIREWIRE RANDOM DISMOUNT PROBLEM SINCE. I do not know if this is a freak coincidence -- but so far, so much the better for my firewire drive.
    Hope this helps someone else down the line... eh hem...

  • AIR event when computer awakes from sleep mode?

    Hi,
    I have an AIR app that displays a new set of photos every 12 hours. Some users are complaining that the photos are not refreshed after 12 hours if the computer had been in sleep mode over night.
    At first I thought possibly the Timer was stopping when in sleep mode so I instead modified the Timer to execute every minute and just check to see if the last refresh was at least then 12 hours ago. This still did not solve the issue.
    Is there an event dispatched I can listen for to detch when the computer awakes from sleep mode? Or if any one has any other suggestions.
    Thanks,
    Ryan

    No answer till now. Better close it.

Maybe you are looking for