rMBP 15" resolution after hdmi output (black bars)

Discussion in 'MacBook Pro' started by Lukewarmwinner, Oct 25, 2014.

  1. Lukewarmwinner macrumors 6502

    Oct 12, 2012
    Hi guys

    Sometimes I connect my rMBP to my Panasonic to watch movies. I use a hdmi-hdmi cable and the display automatically detects the resolution and everything is fine. However when I disconnect my Mac and use it without the screen it keeps the black bars at the bottom and top during startup. I have to reset pram for this to keep happening. Is that normal and is there anything I can do to prevent it? The same thing goes when using Airplay-mirroring.
  2. JoelTheSuperior macrumors 6502


    Feb 10, 2014
    London, UK
    Can't say I'm exactly sure why this is happening but something you can try to get the resolution back to normal after disconnecting the TV:

    1. Go to System Preferences
    2. Click Displays
    3. Hold option - 'Detect Displays' should appear. Click it.

    Fingers crossed after doing this it will detect that your TV is no longer connected and restore to the correct resolution.
  3. Lukewarmwinner thread starter macrumors 6502

    Oct 12, 2012
    It worked! Thanks :)
  4. Anitramane macrumors 6502

    Dec 23, 2013
    It's probably happening because TS panasonic having a wider aspect ratio than the Mac and it ****s up.

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