> > 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 > dtr...@vcsvikings.org > (207) 923-4305 > > > -- > edubuntu-users mailing list > edubuntu-users@lists.ubuntu.com > Modify settings or unsubscribe at: > https://lists.ubuntu.com/mailman/listinfo/edubuntu-users > >
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