Mac Mini with Dell Monitor looks blurry

Discussion in 'Mac mini' started by Cherish, Dec 11, 2014.

  1. Cherish, Dec 11, 2014
    Last edited: Dec 12, 2014

    Cherish macrumors member

    Sep 27, 2014

    I just connected my Mac Mini to Dell U2312HM 1080p monitor using HDMI to DVI Cable but the images and fonts all looks blurry and jagged.

    The Chrome tabs and bookmarks font are also too small to see on the Mac. Everything looks fine if I connect the monitor to a PC so anyone knows what could be the problem?

    Have already tried turning off font smoothing and reduce transparency.



    Take note of the /// and Chrome tab and bookmarks font. It looks so much sharper when the monitor is used with Windows.
  2. xraydoc macrumors 604


    Oct 9, 2005
    I don't see anything wrong with that screenshot. Likely it's because it's a problem with the monitor, not the Mac, no one but you will see the problem.

    Could the monitor's settings be out of whack (brightness, contrast, etc.).
  3. Cherish, Dec 11, 2014
    Last edited: Dec 12, 2014

    Cherish thread starter macrumors member

    Sep 27, 2014
    My monitor settings are all set to default. I just updated my post with comparisons pictures.

    Are the Chrome tab/bookmarks fonts supposed to look this small and blurry though? Even Safari/Mail/Calendar/VLC fonts all look too small.
  4. Sun Baked macrumors G5

    Sun Baked

    May 19, 2002
    I think that you can check the Dell's on screen display to see if the signal it is getting is either YPbPr or RGB.

    And likely can check the system profiles to see if Mac OS X is detecting the monitor as a HDTV or a monitor and defaulting to the wrong signal (YPbPr).

    Force RGB Dell Mac OS X -- seem to be commonly connected search terms for those with Dell display problems with their Macs.

    The other one was disabling Displayport 1.2 on the dell monitors.

    Don't know much about the issue, but keep seeing threads pop up on these.
  5. gnasher729 macrumors P6


    Nov 25, 2005
    Looks like the monitor is not used in its native resolution.

    System Preferences -> Displays -> Check what resolutions are offered.

    Clearly visible in the icon on the left for the "Forum" icon.
  6. Cherish, Dec 12, 2014
    Last edited: Dec 12, 2014

    Cherish thread starter macrumors member

    Sep 27, 2014
    The Display shows 1080p 60z which is the right resolution for my monitor.


    Dell display options show RGB as the input and System profiles only show Dell U2312HM Display. No TV mentioned. I don't see any Overscan options on both monitor and display preference too.
  7. nep macrumors newbie

    Dec 12, 2014
  8. Cherish thread starter macrumors member

    Sep 27, 2014
    Just tried this using terminal but it look worst with font smoothing on. I changed GAMMA on the dell monitor to mac and it looks better but still looks slightly blur.

    What monitor do you guys use with your Mac Mini and how do you guys connect it? I might just get a new monitor if there is no other option. :mad:
  9. Fishrrman macrumors G5


    Feb 20, 2009
    Does the Dell display have a displayport connector?

    If so, have you tried using a minidisplayport (Mac end) to displayport (Dell end) on it?
  10. cinealta macrumors 6502

    Dec 9, 2012
    Are you running Yosemite?
  11. Cherish thread starter macrumors member

    Sep 27, 2014
    I tried mini display port Mac to display port Dell and the display looks the same to me.

  12. Cherish thread starter macrumors member

    Sep 27, 2014
    Invalid Link
  13. Tsavo macrumors newbie

    Dec 6, 2014
    I posted this in another thread:

    Posting screenshots of either screen doesn't do anything, since all it's doing is dumping the framebuffer to an image file. Therefore, the problem with the image is in between the video output of the Mini and your eyes.

    1. Cable.
    2. Monitor.
    3. Monitor calibration.
    4. Eyes (highly unlikely that these need to be calibrated).

    You need to actually photograph the screens in order for us to notice the difference between them.
  14. BrianBaughn macrumors 603


    Feb 13, 2011
    Baltimore, Maryland
  15. cinealta macrumors 6502

    Dec 9, 2012
    Are you sure it's not Yosemite's font smoothing etc?
  16. Cherish, Dec 13, 2014
    Last edited: Dec 13, 2014

    Cherish thread starter macrumors member

    Sep 27, 2014
    Thanks. I wanted to try this but there is no Display folder in Library probably cause it's a MM not MBP.

    Anyway, I just checked my system profile display and it shows ARGB8888 not YCBCR.
    Font Smoothing on:
    Font Smoothing off:
    Not sure why the image looks pixelated using screenshot shortcut to capture but it's not on my screen. However, you can see the font looks bad.

    The fonts looks too small and blur compared to this screenshot taken by another user where the text looks sharper and bigger.
  17. xraydoc macrumors 604


    Oct 9, 2005
    The bottom screenshot from another user is from a retina Macbook. So everything will look very different from your non-retina Mac.
  18. veeectorm macrumors newbie

    Jan 31, 2015
    Did anyone notice the screenshots are on different resolutions?

    Sorry if im bumping a a-bit-too-old thread...
  19. grandM macrumors 6502a


    Oct 14, 2013
    you must run the patch forcing it no longer handling your dell as a TV set
  20. Natzoo macrumors 65816


    Sep 16, 2014
    Not sure where i am
    maybe its just a dell monitor? nothing wrong with it
  21. kaminsky macrumors newbie

    Jul 3, 2009
  22. frank4 macrumors regular


    Oct 17, 2011
    Running a pair of Dell S2340L monitors here (one direct HDMI, other by mini-DP to HDMI adapter) and they look great.

    I have set the on-screen sharpness control on the monitors to 50, if the sharpness is set too low they look blurry. Sharpness set too high and the fonts look bad also.
  23. sevoman macrumors member


    Jan 23, 2016
    Ancient Egypt
    OSX and windows have different anti/aliasing for fonts. No way around it. That's how macs are. Even on a 4k iMac vs a 1080p dell monitor with windows... side by side, the windows looks much sharper while the mac fonts look thicker, somewhat bold, and fuzzy. For the sake of my own madness I have compared multiple units side by side and that's just how it is. No, turning on or off font smoothing does not help. The terminal command which supposedly fixes this also does not help. FYI chrome look much more blurry on osx than does safari. Open the same webpage and compare side by side on osx. Anyhow, there are NO fixes, every solution listed across the web is anecdotal, usually followed by 'worked perfect for me' and a few 'no change for me'. Placebo changes. If you like the Windows graphics stick with windows, if you can live with the osx style of fonts/lines, then stick with osx. If it doesn't matter then choose your OS based on other issues. Bottom line, that's the way it is.

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