Need help with monitor resolution Dell Optiplex GX620

[David Trask]

I fixed it...I learned not all DVI is the same.  The 620's use DVI-I...you
need to have a DVI-I adapter.

Odin Nøsen <odin at gnuskole.no> writes:
>I have a bunch of Dell Optiplex GX620's that I want to use in my lab.
> They have one video output with a DVI-VGA dongle.  I am using a DVI to
>VGA adapter to connect to my VGA only ACER G185H monitor which has a
>native resolution of 1366x768 running at 60 hz
>
>So...no matter what I try (I've pasted my entry in lts.conf below...and
>I've tried varying options within by commenting things out...etc)  My
>xrandr -q output on the thin-client says that VGA1 is active and for
>modes up to 1024x768 (which looks silly on a 16.9 monitor of this size)
> It also says DVI1 is disconnected.  I'm running Edubuntu 12.04....and
>I'd really like to solve this...it's about the only thing I have left.
> Any ideas?
>
>
>
>I think you are out of luck... :-(
>
>
>We've had the same problem with a lot of Optiplexes with only a
>HDMI-output and using a HDMI->VGA-dongle. If we use HDMI X always chooses
>the right resolutions from the EDID-information. If we use VGA EDID, for
>some reason, always collapses to default 1024x768, 800x600 and 640x480. I
>think this is because they save some pennies by not connection all the
>pins in the VGA-port.
>
>
>Doing a simple X_MODE_0=1366x768 won't work, because it isn't a mode from
>EDID while using the VGA1-port. 
>
>
>I've searched the Internett for a solutions, but the only thing that I
>find is making a xorg.conf-file with some kind of default setup with the
>right monitor modes. You can use a xconf.conf generated when you use the
>DVI-connection as a start.
>
>
>
>
>Odin
>
>
>
>
>
>  [00:12:3f:c0:a8:81]
>  HOSTNAME = L11
>  XRANDR_DISABLE=True
>  XRANDR_OUTPUT_0 = "VGA1"
>  XRANDR_OUTPUT_1 = "DVI1 --off"
>  X_MODE_0=1366x768
>  XRANDR_RATE_0 = 60 
>
>David Trask
>Technology Director/Teacher
>Vassalboro Community School
>[ mailto:dtrask at vcsvikings.org ]dtrask at vcsvikings.org
>[ tel:%28207%29%20923-4305 ](207) 923-4305
>
>
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>



David Trask
Technology Director/Teacher
Vassalboro Community School
dtrask at vcsvikings.org
(207) 923-4305

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