Cannot change dekstop background

Discussion in 'Mac mini' started by riaaz66, Dec 25, 2010.

  1. riaaz66 macrumors newbie

    Dec 24, 2010

    I've a mac mini, with two 24" Cinema Led displays. One display is connected directly to the mac mini (main screen) and one display is connected through a DVI-to-Mini-DisplayPort Converter from Athlona (secondary screen).

    Yesterday I rebooted the machine and since the reboot I cannot change my main screens desktop background. I tried every solution from several fora on the net, but did not succeed to change it. I only have a solid gray colored background. Normally, when you select a wallpaper, it instantly changes the background. Now it doesn't. You can see it change in the "Desktop & Screensaver" menu, but nothing happens in real. Changing the background of the secondary screen is no problem.
    When I restart the machine, you can see that the solid gray colored background goes away and the original chosen wallpaper appears, but then closes because I restarted the system. On start-up of the system, you can see the original chosen wallpaper again for a few seconds, while the machine starts applications to open at login, and then suddenly changes again into the solid gray colored background.

    Can somebody please help me with this issue???
  2. riaaz66 thread starter macrumors newbie

    Dec 24, 2010
    Hmmm..thanks....but it didn't work.
    Any other suggestion. It looks like that the solid gray background on screen 1 is a layer above the originally selected wallpaper. Because when I restart the computer, the originally selected wallpaper appears when closing the machine and when starting up the machine.
    Any other suggestion.
  3. DewGuy1999 macrumors 68040


    Jan 25, 2009
    I was hoping the PRAM/NVRAM reset would work. Have you tried a different wallpaper? You mentioned doing a restart, have you tried a shutdown followed by a cold boot? Also, any luck changing the background on your main display if you disconnect the secondary?
  4. BigDukeSix macrumors 6502a


    Sep 22, 2010
    34.6700N 118.1590W
    I suggest just trying one monitor at a time, connect first through the primary monitor connection and then again through the DVI connection to see what happens under those circumstances. Let us know the results of your test.

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