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Problems with screen resolution after installing NVIDIA drivers in Ubuntu 12.04 LTS

10/9/2012

3 Comments

 
Following a recent upgrade to Ubuntu 12.04 LTS and re-installation of the NVIDIA driver in one of our LInux desktops (hauptman), the screen resolution was very low, something like 640x480 pixels. The procedure to re-install the NVIDIA driver was the following:

1) Download the NVIDIA driver that matches the type of your graphics card from here. In our case, we needed the driver for the NVIDIA GeForce GT 430 card (LInux 64-bit). The driver is bundled in a self-extracting package named NVIDIA-Linux-x86_64-304.51.run

2) Switch to console mode using Ctrl + Alt + F1

3) Exit the X server with the command: sudo service gdm stop (for the GNOME desktop). For the KDE desktop, the command is sudo service lightdm stop

4) Install the NVIDIA by executing the self-extracting package downloaded in step 1

sudo sh NVIDIA-Linux-x86_64-304.51.run.

When the installer asks whether to generate a new X server configuration file, the answer is yes.

5) After the installation is complete, restart the machine by issuing

sudo /sbin/reboot

After logging in, it is evident that the screen resolution is very low. Examining the X server configuration file /etc/X11/xorg.conf created by the NVIDIA driver installer, we see that in the Section "Monitor", the option ModelName is not defined. The installer did not resolve the monitor model (in our case, it was DELL U2311H).  In addition, in the Section "Screen" of the xorg.conf, the option for the screen resolution is set inappropriately as "metamodes" "640x480 +0+0; nvidia-auto-select +0+0"

A way that one might get around this is to install again the monitor drivers and repeat steps 1 - 4 mentioned above. Unfortunately,  there was no driver available in the Dell website for the type of monitor we have (DELL U2311H).

The solution was to edit /etc/X11/xorg.conf in hauptman so that it contains the options found in xorg.conf file from another Linux machine (flory) which has the same type of NVIDIA graphics card and monitor.  The final version of the /etc/X11/xorg.conf looks like this

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0" 0 0
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
    Option         "Xinerama" "0"
EndSection

Section "InputDevice"
    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "auto"
    Option         "Device" "/dev/psaux"
    Option         "Emulate3Buttons" "no"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"

    # generated from default
    Identifier     "Keyboard0"
    Driver         "kbd"
EndSection

Section "Monitor"
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "DELL U2311H"
    HorizSync       30.0 - 83.0
    VertRefresh     56.0 - 76.0
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce GT 430"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "TwinView" "0"
    Option         "metamodes" "1920x1200 +0+0"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

After rebooting the machine

sudo /sbin/reboot

the changes will have taken effect and the screen resolution will be  1920x1200
3 Comments
for details link
8/22/2013 07:20:55 pm

When it comes to the issues with the computer apps and players, I land on your site and collect the necessary information. I am glad that you have taken the effort to share this with the users and I have saved your page for further visits. Keep up your good work.

Reply
Ali
6/23/2020 02:41:32 am

You saved me 100 Euro, I was about to throw away the monitor and buy another one!

Reply
modxcomputers link
8/12/2022 06:31:53 am

It can be fixed by updating the driver. That might be work or else you can upgrade to new version

Reply



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    Alexis, Maria, Dimitra, Ioannis,  Michalis, Danai, Panos, George, Aspa, Zoe

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