Page 1 of 3 123 LastLast
Results 1 to 10 of 27

Thread: 20.04 - Screen problem (vertical green lines)

  1. #1
    Join Date
    Jul 2011
    Beans
    38

    20.04 - Screen problem (vertical green lines)

    The problem was related to the Nvidia driver not loading. The vertical green lines were a pixel graphic glitch that also corrupted icons and changed shape and colors along the way.

    Here is how I solved it, thanks to Bashing-om!

    1. Find out if Nvidia is blacklisted:

    Code:
     ~$ ls -al /lib/modprobe.d
     total 44
     drwxr-xr-x  2 root root 4096 May 14 15:02 .
     drwxr-xr-x 23 root root 4096 May 13 18:54 ..
     -rw-r--r--  1 root root  655 Mar 12 13:15 aliases.conf
     -rw-r--r--  1 root root 1542 May  7 11:54 blacklist_linux_5.3.0-53-generic.conf
     -rw-r--r--  1 root root 1545 May  7 11:54 blacklist_linux_5.3.0-53-lowlatency.conf
     -rw-r--r--  1 root root 1542 May  7 09:05 blacklist_linux_5.4.0-31-generic.conf
     -rw-r--r--  1 root root 1545 May  7 09:05 blacklist_linux_5.4.0-31-lowlatency.conf
     -rw-r--r--  1 root root  183 May 14 15:02 blacklist-nvidia.conf
     -rw-r--r--  1 root root  390 May  7 13:21 fbdev-blacklist.conf
     -rw-r--r--  1 root root   81 Apr 22 03:18 nvidia-graphics-drivers.conf
     -rw-r--r--  1 root root  765 Apr  1 17:23 systemd.conf
    2. Remove Nvidia from blacklist:

    The process is described here: https://ubuntuforums.org/showthread.php?t=2419319

    I report it here below for ease of use:

    Code:
    $ sudo apt-get remove --purge '^nvidia-.*'
    $ sudo apt-get autoremove
    $ sudo rm /usr/share/X11/xorg.conf.d/20-intel.conf
    $ sudo rm /etc/X11/xorg.conf
    $ sudo rm /var/log/Xorg.*
     $sudo apt install nvidia-prime
    $ sudo prime-select nvidia
    $ grep blacklist /etc/modprobe.d/* | grep nvidia
    sudo rm /etc/modprobe.d/blacklist-framebuffer.conf
    $ sudo rm /etc/modprobe.d/nvidia-installer-disable-nouveau.conf
    $ grep blacklist /lib/modprobe.d/* | grep nvidia
    $ sudo rm /lib/modprobe.d/blacklist-nvidia.conf
    $ sudo rm /lib/modprobe.d/nvidia-graphics-drivers.conf
    $ sudo apt-get install nvidia-driver-440
    $ sudo reboot
    ---------------------------------------------------------------
    Initial message:
    ---------------------------------------------------------------

    Hello all,

    After upgrading to Ubuntu 20.04, my screen has now two vertical green lines in across the desktop background (here: https://imgur.com/SRvog9E).

    Does anyone know why is that and how I can get rid of them?

    Update: icons are also occasionally disrupted. Pixels are all over the place. Sometimes browser windows are purple dark, especially with low latency.
    Last edited by lpalazzotto; May 18th, 2020 at 12:34 AM.

  2. #2
    Join Date
    May 2013
    Location
    Galiza
    Beans
    1,897
    Distro
    Ubuntu

    Re: 20.04 - Screen problem (vertical green lines)

    Vertical (or horizontal) green lines usually mean hardware problem.
    Please try with a live session to confirm.

  3. #3
    Join Date
    Jul 2011
    Beans
    38

    Re: 20.04 - Screen problem (vertical green lines)

    Is there any other way to find out, besides a live session?

  4. #4
    Join Date
    Jul 2011
    Beans
    38

    Re: 20.04 - Screen problem (vertical green lines)

    I am quite sure is a software problem: the stripes appear only when it reaches the desktop. I have Windows on the same PC and it works fine.
    +the problem started with 20.04. With 19.04 I had no issues.

  5. #5
    Join Date
    Jul 2011
    Beans
    38

    Re: 20.04 - Screen problem (vertical green lines)

    In case: my video cards are

    VGA compatbile controller: Intel UHD Graphics 630 (mobile)
    3D controller: NVIDIA GP107M [GeForce GTX 1050 Ti Mobile]

  6. #6
    Join Date
    May 2013
    Location
    Galiza
    Beans
    1,897
    Distro
    Ubuntu

    Re: 20.04 - Screen problem (vertical green lines)

    You could have said you have a dual-boot and it doesn't happen in the other OS from the start. That would be good enough to rule out hardware problems.

    Now, does it happen with Intel, Nvidia or both? Which drivers have you installed?

  7. #7
    Join Date
    Jul 2011
    Beans
    38

    Re: 20.04 - Screen problem (vertical green lines)

    Nvidia 440

  8. #8
    Join Date
    Jul 2011
    Beans
    38

    Re: 20.04 - Screen problem (vertical green lines)

    I cannot switch to intel anymore: not sure why. It disappeared from the "Additional Drivers" tab of the Software & Updates

  9. #9
    Join Date
    Jul 2010
    Location
    ozarks, Arkansas, USA
    Beans
    13,589
    Distro
    Xubuntu 18.04 Bionic Beaver

    Re: 20.04 - Screen problem (vertical green lines)

    lpalazzotto; Hello -

    For diagnostic purposes; please post back:
    Code:
    lspci -k | grep -iEA5 'vga|3d'
    sudo lshw -C display
    cat /usr/share/X11/xorg.conf.d/10-nvidia.conf
    cat /var/log/gpu-manager.log
    dpkg -l | grep -i nvidia
    lsmod | grep -i nvidia
    See here what the hardware is, what is or is not installed, and what the system thinks/
    Then we see where to go to next.

    there is a process
    THE current(cy) in Documentation:
    https://help.ubuntu.com/community/PopularPages

    Happy ubuntu'n !

  10. #10
    Join Date
    May 2013
    Location
    Galiza
    Beans
    1,897
    Distro
    Ubuntu

    Re: 20.04 - Screen problem (vertical green lines)

    It is NOT in Additional drivers one switch graphics profiles anyway...
    With Intel+Nvidia it's using Nvidia X Server Settings. Please open it, switch to Intel at Prime profiles, confirm, reboot and test. Then repeat the process to switch back to Nvidia.

    Doing this you should then be able to answer the "does it happen with Intel, Nvidia or both?"

    However, if there's a problem with Nvidia X Server Settings that is usually indicative of problems with the Nvidia drivers. We can troubleshoot from there if needed.

    By the way, are you sure there's no problem in Windows when using either cards?

Page 1 of 3 123 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •