[sf-lug] Fwd: [UMALUG] Detect displays and resolution with nvidia-settings

Sameer Verma sverma at sfsu.edu
Wed Apr 2 09:43:22 PDT 2008

Kristian Erik Hermansen wrote:
> Any ideas?
> ---------- Forwarded message ----------
> From: Michael Ash <mash at econs.umass.edu>
> Date: Wed, 2 Apr 2008 12:07:47 -0400
> Subject: [UMALUG] Detect displays and resolution with nvidia-settings
> To: umasslug at ecs.umass.edu
> Dear all,
> I am using nvidia-settings with much success to manage two displays
> with TwinView.    nvidia-settings has a nice gui to set the two
> displays next to each other, above and below, cloned, etc.
> One oddity is that when I plug  the cable from the external monitor
> into my laptop and "Detect Displays"  the highest resolution that the
> external monitor offers is 640x480.  If I need the two monitors at the
> same resolution, then I have to heavily downgrade the resolution on my
> laptop.  Here's the oddity:  if I boot up with the external monitor
> plugged in, then it, not my laptop monitor, is active, and it achieves
> a resolution of 1024x768 (or sometimes higher). I can then enable my
> laptop monitor.
> So why won't the external monitor offer better than 640x480 when I
> connect it second?  Is there a way to force a higher resolution?
> Thanks.
> Best,
> Michael
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> UmassLUG at ecs.umass.edu
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I have the same problem in my classrooms, especially with older
projectors. If I swap my /etc/X11/xorg.conf with this one (a copy of my
old xorg.conf at http://opensource.sfsu.edu/node/172) then it works
fine. Go figure.

I haven't had time to discern the differences between the xorg.conf from
nvidia-settings and the one I had from a while ago. I am sure the
"nugget of knowledge" is lodged somewhere in there .


Dr. Sameer Verma, Ph.D.
Associate Professor of Information Systems
San Francisco State University
San Francisco CA 94132 USA

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