dual display vga hdmi issue

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dual display vga hdmi issue

I have a mac mini with a dual display set up. One display is output through the hdmi to the apple dvi connector and to the monitor. It seems to work fine. The second display is output via the mini displayport to a vga converter. One monitor is an HP2511x and the other an Acer H243H. It doesn't seem to be a monitor issue because it is always the monitor connected via vga.

The proiblem is the image is shifted left by about an inch. Sometimes it starts ok, but as soon as I log in, and the monitor does an autoconfig it shifts. I also notice that the vga connection displays as a generic monitor, while the dvi picks up the monitor type correctly.

If a single monitor is used it works fine.

Mac mini, iOS 6.1.3

Posted on Jun 13, 2013 2:55 PM

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Answer 1

BDAqua

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Jun 13, 2013 3:10 PM in response to sirving

Hello, In Displays, is there a different Hz setting for the VGA monitor?

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Answer 2

sirving Author

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Jun 13, 2013 4:12 PM in response to BDAqua

the vga only runs at 60Hz. This frequency works fine for the monitor if it's by itself or attached to either a linux or windoze machine as part of a similar dual display setup.

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Answer 3

BDAqua

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Jun 13, 2013 6:06 PM in response to sirving

If just the VGA monitor is conneted, does it still do that?

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Answer 4

sirving Author

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Jun 13, 2013 6:12 PM in response to BDAqua

As noted in the original message, no, by itself the vga is ok.

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Answer 5

BDAqua

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Jun 14, 2013 12:07 PM in response to sirving

I only found the 60 Hz spec for one of those, the other had no Hz rating I could find, & my theory is that that one is not 60 Hz, at least I think this would explain what is happening. :)

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Answer 6

BDAqua

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Jun 14, 2013 12:11 PM in response to sirving

Might look into DisplayConfigX...

http://www.3dexpress.de/

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Answer 7

sirving Author

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Jun 14, 2013 8:04 PM in response to BDAqua

The set up menu on both monitors state the recommended is 1920x1080 and 60Hz. Running both from Windoze and linux with this setting works fine.

DisplayConfigX doesn't run properly, complains that powerpc software is not supported. The message is Launch of "DisplayConfigX" failed: the PowerPC architecture is no longer supported. As can be seen from the system information display the mac is Intel.

Model Name: Mac mini

Model Identifier: Macmini5,1

Processor Name: Intel Core i5

Processor Speed: 2.3 GHz

Number of Processors: 1

Total Number of Cores: 2

L2 Cache (per Core): 256 KB

L3 Cache: 3 MB

Memory: 8 GB

Boot ROM Version: MM51.0077.B10

SMC Version (system): 1.76f0

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Answer 8

BDAqua

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Jun 15, 2013 10:18 AM in response to sirving

Uhhhg, sorry, didn't know it was PPC only. 😟

Sure sounds like a bug in SW or HW, I doubt there's a fix for it.

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