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Old 02-01-07, 01:00 AM   #1
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Default 1680 x 1050 native res not working

So I've got a 20" Widescreen LCD with a native resolution connected via a 10-foot DVI cable to my Gainax Geforce 5600 FX 256MB Video Card, with Ubuntu 6.10 running GNOME sitting on top. Only problem is that no matter what I do, it won't recognize that resolution as valid! It's stretching 1280 x 1024 to fit the screen right now, and it looks kind of gross, and I really just wish the native resolution would work! I've tried numerous modelines, but all to no avail...at least so far, anyway. I've attached a copy of my most recent attempt of an xorg.conf file along with the corresponding Xorg.0.log file.

I really hope there's someone here who can figure it out. Is it just that my card's incompatible? With 256MB of video memory, I wouldn't think so...but I suppose I'm not really an expert on the matter.
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File Type: log Xorg.0.log (19.9 KB, 109 views)
File Type: txt xorg.conf.txt (3.0 KB, 132 views)
soapergem is offline   Reply With Quote
Old 02-01-07, 02:07 AM   #2
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Default Re: 1680 x 1050 native res not working

Maybe helpful.
BR, Euxine
EuxineTL is offline   Reply With Quote
Old 02-01-07, 03:44 AM   #3
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Default Re: 1680 x 1050 native res not working

Things are not as they were in the past...
Before, you could tell the X server what to do. You created a modeline, tell the X server that this is the timing it has to use, and it would work fine.

Then came the days of "plug and play". First in Windows, but it has invaded Linux as well. Now you see log lines like "screen resolution determined to be 1280x1024" which is clearly incorrect. Maybe the monitor provides incorrect EDID data, maybe the driver does not read it correctly.
Things go worse from there: it decides your modeline is invalid, discards it, then tells you it has no mode for the resolution you want and inserts its own default mode which is the 1280x1024 you see.

How we got in the state where the driver "thinks", and even worse: thinks it should trust EDID data more than configuration file options, is unclear. But that is where we are now.

Fortunately there still are configuration options that turn off this behaviour.
You can try adding this option for the device:
Option "ModeValidation" "NoDFPNativeResolutionCheck"

There are also other options. Read the driver README.
pe1chl is offline   Reply With Quote
Old 02-01-07, 09:17 AM   #4
NVIDIA Corporation
Join Date: Dec 2004
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Default Re: 1680 x 1050 native res not working

If this problem persists with 1.0-9746, please start X with the following command:
startx -- -logverbose 6

and then generate and attach an nvidia-bug-report.log.

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