Kinda OT: Display preference setting renders display unresponsive
Kinda OT: Display preference setting renders display unresponsive
- Subject: Kinda OT: Display preference setting renders display unresponsive
- From: Jonathan Hendry <email@hidden>
- Date: Fri, 11 Dec 2009 14:05:36 -0500
Hi,
This is kinda off-topic, for which I apologize, but the amount of
monitor discussion suggested that it might at least be useful. I
didn't see any other lists that seemed more appropriate.
In the lab here we have a MacPro with two monitors attached, a Dell
LCD and a Samsung 2233 LCD. Each has its own video card. Originally,
both were connected via DVI.
Oddly, the Samsung came up in System Preferences as if it were a TV.
The refresh rate popup listed "60 Hz (NTSC)", and an Options tab
offered an "Overscan" checkbox, which was selected. (The refresh popup
also listed 100, 110, and 120 Hz, but selecting any of those caused
the Samsung to behave as if no cable were connected, although the Mac
still saw it connected.)
When I deselected the Overscan checkbox, it was as if I had
disconnected the Samsung. System Preferences no longer saw it, nor did
System Profiler. Rebooting didn't bring the monitor back.
The only way to make the Samsung visible to the Mac Pro was to plug it
into another video out, the DisplayPort on the same card, or either
connector on the other card.
So I presume that 'Overscan' preference is being persisted somewhere
on the Mac, and I need to restore the preference to the default in
order to get things back to normal.
So, my question is: Does anyone know where this kind of setting would
be stored, and how I might clear it?
(And if anyone can suggest why OS X seems to think it's a TV, and/or
why the 100/110/120 Hz settings don't work though the monitor supports
them, that would also be appreciated.)
Thanks!
- Jon
--
Jonathan Hendry
Maunsell Lab
Neurobiology Dept.
Harvard Medical School
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