Hacking xorg.conf

From: John Aldrich 
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Ok, I have the following as  my xorg.conf and it STILL won't give an option of 
a resolution higher than 1024x768:

# RPM Fusion - nvidia-xorg.conf
# 
Section "Device"
        Identifier  "Videocard0"
        Driver      "nvidia"
EndSection
Section "Monitor"
        Identifier   "Monitor1"
        VendorName   "Dell"
        ModelName    "E2210H"
        HorizSync    30.0 - 83.0
        VertRefresh  50.0 - 75.0
        Modeline "1920x1080@75" 249.64 1920 1952 2896 2928 1080 1101 1114 1135
EndSection


What more do I need to do to force it to allow me to have a higher resolution? 
I haven't had to hand-create an xorg.conf file from scratch like this before... 
at least in the past, I had SOME idea what I was doing with the Xf86.conf file, 
but this doesn't have any real resemblence to what I used to hack on back 
then.

It just seems to ignore the settings in the monitor section. Do I need to 
specify something in the "device" section?

===============================================================
From: David Della Vecchia 
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I'm digging deep into my memory banks of xorg hacking in debian 3 days but
i seem to recall you should have a Screen section below the monitor and
device section that actually sets up the display. Things may have changed
since then though.

-DDV



===============================================================
From: John Aldrich 
------------------------------------------------------
Quoting David Della Vecchia :

Well, I found a website that talked about this and even went into how  
to set up the mode line (and provided a link to a website to figure  
out that info) and it didn't show that sort of thing... 'course I  
might have overlooked it. Guess I'll have to revisit that website and  
see if there's any info on that.


===============================================================
From: William Wade 
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xorg.conf now only needs the differences from what it automatically finds,
so yes you used to need a screen section, but if video is getting to the
monitor likely not.

John, can you post you Xorg.log file?





===============================================================
From: John Aldrich 
------------------------------------------------------
Sure. I found some information on hacking the xorg.conf file here: 
http://www.tuxradar.com/content/modify-xorgconf-better-performance
 and I have tried to hack my xorg.conf file as indicated in that and in the 
comments, but it's still not working. Here's my updated xorg.conf file (which I 
copied over my nvidia-xorg.conf file to be on the safe side, but I *do* have a 
backup copy of the nvidia-xorg.conf, if necessary.)

# RPM Fusion - nvidia-xorg.conf
# 
Section "Monitor"
        Identifier   "Monitor1"
        VendorName   "Dell"
        ModelName    "E2210H"
        HorizSync    30.0 - 83.0
        VertRefresh  50.0 - 75.0
        Modeline "1920x1080@75" 148.5 1920 1952 2896 2928 1080 1101 1114 1135
EndSection

Section "Screen"
        Identifier      "Default Screen"
        Monitor         "Monitor1"
        Device          "Videocard0"
        DefaultDepth    24
EndSection

Section "Device"
        Identifier  "Videocard0"
        Driver      "nvidia"
EndSection


And here's the log file as requested:
[    20.942] 
X.Org X Server 1.11.2
Release Date: 2011-11-04
[    20.943] X Protocol Version 11, Revision 0
[    20.943] Build Operating System: x86-12 2.6.32-131.17.1.el6.x86

===============================================================
From: John Aldrich 
------------------------------------------------------
It appears that since the system can't detect what my hardware is it's 
ignoring the xorg.conf file, but isn't that WHY we hack the xorg file???


===============================================================
From: William Wade 
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Ok the relevent line is the EDID line.

See http://ubuntuforums.org/showthread.php?t=992869

And you can get the EDID from
http://linuxtoolkit.blogspot.com/2009/11/using-read-edid-to-extract-useful.htmllikely.

Try that and see where it goes.

Wil


===============================================================
From: John Aldrich 
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Sorry...the second link is 404-compliant. :(


===============================================================
From: John Aldrich 
------------------------------------------------------
Get-edid seg-faults. :( Guess I'm going to have to disconnect from the KVM and 
plug straight in to get that. :( WHY can't anything be simple any more??? 
Sheesh!


===============================================================
From: William Wade 
------------------------------------------------------
Perhaps.

Also on another line of investigation, have you tried running
nvidia-settings ?



===============================================================
From: John Aldrich 
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Thanks. That works. I've now got it  set for 1600x1200. The only other option 
was WAY too small! :D


===============================================================
From: William Wade 
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Nvidia did a nice job with that little utility. A lot of stuff can be
changed in there, but most people don't know about it.

Glad it worked for you.