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Thread: Dual monitor in Ubuntu 14.04

  1. #1
    Join Date
    May 2009
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    Ubuntu 14.04 Trusty Tahr

    Question Dual monitor in Ubuntu 14.04

    Hey Folks.

    After a two year hiatus from Ubuntu (and Linux in general), I finally decided to try Ubuntu out once again.
    So I installed Trusty Tahr two days ago and found that only the screen connected through the DVI-port of my graphics card worked. Another monitor connected through the HDMI-port though will tell me it cannot get any signal..
    I wouldn't really mind if I were not accustomed to having lots of screen 'real estate'. Once you buy that second monitor it's nigh impossible to go back to working, browsing, etc. on just a single screen without the sensation of confinement.
    I've digged through an abundance of forum posts on that matter, but I simply don't have the expertise to judge if the attempted fix suits my issues or even trying to understand what the proposed remedy does to repair the problem at hand (I'm beginning to feel like a monkey with a keyboard). After trying a few things which didn't work and messing up the whole system at it, I made a clean reinstallation of Ubuntu 14.04.
    A bit more information about my current system:

    • Clean, unchanged installation of Ubuntu 14.04
    • nVidia GTX 780 Graphics chip
    • Intel i5 processor
    • If you need anything more, I will edit my post


    Thanks for any advice, expression of condolence, ....

    Max

    EDIT: Installing the nVidia proprietary driver completely ****ed my system up. Once I log in I am presented with the standard wallpaper and am able to move the mouse, but nothing else. The sidebar won't show up, right clicking doesn't open a context menu and pressing ctrl alt 1 will only give me a black screen. Does anyone know how to revert the installation of the driver, so I can at least access my ubuntu again?
    Last edited by madmaxou; April 28th, 2014 at 10:16 PM.

  2. #2
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    Ubuntu Development Release

    Re: Dual monitor in Ubuntu 14.04

    You need nvidia's proprietary drivers, obviously.
    Galiza Nação!

  3. #3
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    Ubuntu 14.04 Trusty Tahr

    Re: Dual monitor in Ubuntu 14.04

    Quote Originally Posted by Vladlenin5000 View Post
    You need nvidia's proprietary drivers, obviously.
    Obviously. Thanks for your insight.
    So how do I do that exactly?

  4. #4
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    Re: Dual monitor in Ubuntu 14.04

    The easiest way is simply open the additional drivers tab in Software & Updates, select the recommended version, let it install - it can take several minutes - and then reboot.
    Galiza Nação!

  5. #5
    Join Date
    Apr 2014
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    Re: Dual monitor in Ubuntu 14.04

    I have only recently done dual monitors with Lubuntu 14.04, but they should be similar.

    You might want to try the default ubuntu Nvidia driver, Nouveau, before you go proprietary. It might work and might be more stable. It worked well for my older Nvidia card. I don't know enough about ubuntu to undo the proprietary driver, other than remove the video card, install a non-Nvidia card, which will reset the driver, log on, then remove the NVidia driver.

    Once you solve the driver problem you should have a program called "randr" that you use to turn on the second monitor. As I use lxde my program is in preferences > monitor settings, and is called "lxrandr". After you turn in your second monitor they will mirror each other. From Synaptics download a program called ARandR, which will let you configure your monitors side by side, then save these settings to a disk file, so you can recall it when you reboot.

    It is not so hard. Good luck!
    Last edited by Don_Tai; May 2nd, 2014 at 03:00 AM.

  6. #6
    Join Date
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    Ubuntu 12.04 Precise Pangolin

    Re: Dual monitor in Ubuntu 14.04

    are you pressing 1 or f1?

    if you are pressing 1 try pressing ctrl+alt+F1,but reboot the computer and do it at the log in screen(do not sign in at this screen)

    The screen should go black and ask you for your username and password

    login and enter the following

    Code:
    sudo service lightdm start
    Last edited by sammykur; May 2nd, 2014 at 09:28 AM.

  7. #7
    Join Date
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    Ubuntu 12.04 Precise Pangolin

    Re: Dual monitor in Ubuntu 14.04

    If that doesnt work ,try this in a terminal


    Code:
    sudo apt-get remove --purge nvidia*
    (you may have to run the lightdm command again at the login if the desktop doesnt show up at all)

    and then install the nvidia driver from additional drivers

    this may help you out if neither works,

    http://www.tuxgarage.com/2011/04/mis...-in-unity.html

    if you still cant get the HDMI monitor to work and need a newer driver you could try installing the driver with the xorg-edgers repository.

    They are experimental but I have had no problems and have a dual monitor set up running the 331.67 driver on 12.04

    visit their website first though, https://launchpad.net/~xorg-edgers/+archive/ppa


    Code:
    sudo add-apt-repository ppa:xorg-edgers/ppa 
    
    sudo apt-get remove --purge nvidia*
    
    sudo apt-get update
    
    sudo apt-get install nvidia-331
    
    sudo apt-get install nvidia-331-uvm

  8. #8
    Join Date
    Jul 2014
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    Re: Dual monitor in Ubuntu 14.04

    Hi all!
    After google a lot I found very good solution to instal NVIDIA drivers .
    My video board is Geforce 540m .

    1: You need install bumblebee .
    (thx for the http://askubuntu.com/questions/43860...driver-install answered by Vivek )
    First remove current Nvidia installation.
    sudo apt-get purge nvidia*
    sudo apt-get purge bumblebee*
    sudo apt-get update
    sudo apt-get dist-upgrade
    Install Kernel header if didn't already
    sudo apt-get install linux-headers-generic
    Then install bumblebee using below commands:
    sudo add-apt-repository ppa:bumblebee/stable
    For more up-to-date nvidia drivers, you need to add another PPA. As of 12.04, this is still necessary for Nvidia GT 6xxM cards. It may be optional for the GT 4xxM and GT 5xxM series on 12.04. When in doubt, just install it. The command is:
    sudo add-apt-repository ppa:ubuntu-x-swat/x-updates
    sudo apt-get update
    Install Bumblebee using the proprietary nvidia driver:
    sudo apt-get install bumblebee bumblebee-nvidia

    2: Prime and other stuffs


    sudo apt-get purge libvdpau-va-gl1
    sudo apt-get install nvidia-319 nvidia-settings-319 nvidia-prime

    3: I dont have sure if you need both (prime and bumblebee) but my geforce 540m could not be selected without install both .

    4: ubuntu init => NVIDIA X server settings PRIME Profiles , select NVIDIA

    Hope this help .
    Last edited by rafael14; July 30th, 2014 at 02:34 AM.

  9. #9
    Join Date
    Jul 2015
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    Re: Dual monitor in Ubuntu 14.04

    After installing the nvidia drivers you MUST change the X config file.

    Just run
    sudo nvidia-xconfig

  10. #10
    Join Date
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    Ubuntu

    Re: Dual monitor in Ubuntu 14.04

    I had this same issue some time ago and spent a week trying to get dual displays to work. Got tons of "this might work" help from the Forum, but never got it to work. So I got desperate and reinstalled 12.04. Dual displays all but configure themselves in 12.04. There is one thing you must do, however, to make it wll work: Log out, then when you get the log-in box, click the tiny "Ubuntu" logo in the upper right corner and change the setting from the default "3D" to "2D." That's it. From there, the setup is a piece of cake. 12.04 correctly identified and configured both displays all by itself.
    Unanswered questions are far less dangerous than unquestioned answers.

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