Why is OSX with rotated display slow on Mini?

Discussion in 'macOS' started by kraftzwerg, Jul 8, 2005.

  1. kraftzwerg macrumors regular

    Jul 8, 2005
    I like to use the rotate display option in "Display preferences" under Tiger (comes in handy to display whole pages while keeping them readable on a 17 inch screen). However, once I turn on this setting, OSX becomes suddenly terribly slow, e.g. when I move a window the movement lags behind the cursor and is very choppy etc.

    My question: is this an issue that's specific to the Mac Mini ? Is it a harware or a software problem? [Maybe the graphics card is somehow optimized for landscape mode and can't handle portrait mode?] Is there something one can do to fix this?

    Thanks for any hints!
  2. jayscheuerle macrumors 68020


    I'd be guessing to say that it's a limitation of the graphics card in the mini and the iBook, which does not support Core Image. Perhaps this effect is achieved through the use of Core Image?
  3. Veldek macrumors 68000


    Mar 29, 2003
    Though I also think that this is a limitation of the graphics card, I would expect Mac OS X to not show this preference unless it could handle it.
  4. kraftzwerg thread starter macrumors regular

    Jul 8, 2005
    I am surprised though that OSX should need CoreImage for this effect. One would think that it merely needs to exchange the x- and y- coordinates of its display coordinate system, which doesn't sound like it should require a lot of processing power.
  5. MacsRgr8 macrumors 604


    Sep 8, 2002
    The Netherlands
    I don't think it needs Core Image.
    You could enable this feature in Panther aswell, using the ATi Radeon Utilities.

    Install the ATi Display Utilities . It will install drivers, and add a System Pref.
    Maybe that will help.
  6. kraftzwerg thread starter macrumors regular

    Jul 8, 2005
    That was an interesting hint - thanks! I did install the ATI utilities and it did indeed offer another way to rotate the screen. Unfortunately it doesn't seem much quicker than the feature built into Tiger.

Share This Page