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Can't set optimal resolution 1920x1200 on macbook with Dell 2408WFP monitor

Posted on 2009-06-27
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Last Modified: 2013-11-24
Hi,

I bought a Dell 2408WFP monitor that I want to use as an external monitor with my late 2007 macbook running OS X 10.5.7. The macbook is connected to the monitor through mini-DVI to HDMI adapter that is connected to the HDMI port on the monitor. The problem is that the maximum resolution I managed to get is 1920x1024 instead of the full 1920x1200. I even downloaded SwitchResX and tried defining a custom resolution 1920x1200@60Hz, but it doesn't show up in the list of active resolutions after the restart.

Any help resulting in the solution will be greatly appreciated.
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Question by:tantadruj
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strung earned 500 total points
ID: 24729287
According to this:  http://support.apple.com/kb/SP12  your MacBook will support 1920 x 1200 on an external display..

There is an article here: http://theappleblog.com/2009/05/15/how-to-fix-os-x-10-5-7-dvi-hdmi-screen-resolution-issues/ that suggests OS 10.5.7 has broken the ability to use some resolutions when running a DVI to HDMI converter and offers some fixes. 10.5.8 is due out soon and hopefully might fix the problem.

Also:  http://discussions.apple.com/thread.jspa?threadID=2004318&tstart=0
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by:tantadruj
ID: 24729801
Thanks. The SwitchResX settings posted in the linked forum solved the problem. In particular, using simplified settings CVT-RB when defining the custom resolution did the job (I originally used GTF).
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