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user203715
Asked: 2013-10-18 10:32:24 +0800 CST

Mouse cursor flickering and disappearing

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I installed Ubuntu today and since the first start up I have a problem with the mouse cursor.

It starts randomly disappearing and flickering a lot.

I have searched for a solution on Google and here but didn't find anything.

cursor

4 Answers

  1. I had the same problem. You can fix it manually.

    Open System Settings > Displays.

    In the Displays window, you will see an Unknown monitor.

    Click it and disable it.

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  2. Possible cause 1:

    Screen settings: resolution and refresh rate. Can be checked (On KDE) under systemsettings5 then display and monitor

    Possible cause 2:

    Screen compositor: it could be caused by the sale-method/rendering-backend/tearing-prevention those settings can be changed (On KDE) under systemsettings5, display and monitor then compositor... apply new settings and compare

    Possible cause 3:

    Display server mis-configuration: you can regenerate the display server config file with X -configure or similar but first make a copy of /etc/X11

    Possible cause 4:

    System failure, crash, reboot: on system failure especially for systems equipped with SSD you may loose important files; Files under directories like /home/user/, /etc/ or /usr/ can cause serious damages, as these directories contain important settings/packages files for different aspect of the desktop. usually when a file is lost after a crash, the file may be completely deleted or zeroed, you can then search for file with zero size and check out if important file are corrupted with the command find /etc -size 0 -print (this is for /etc) you can also check packages integrity for missing/modified file, on rpm based system it's done with the command rpm -Va you would then reinstall the broken package.

    A common situation in this case is loosing the file /etc/X11/xorg.conf or one of the config file under /etc/X11/ responsible for the display server; If recovering the file is not possible the config can be regenerated with X -configure or similar command

    Possible cause 5:

    Mis-configuration of user files under /home/user... you can verify this by login with an other user... to fix it eventually delete and recreate the user (after backup)

    Possible cause 7:

    Graphic drivers, you need to check if you are using the proper graphic driver and or try a different version of the used driver, usually this often happen with nvidia graphical cards.

    Other...

    The listed situations are not the only possibilities of failure.

    Source: Linuxhacks.org
    Disclosure: I am the owner of Linuxhacks.org

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  3. I ran, from within 16.04, the command:

      sudo apt-get upgrade

    and it seems to have appeased the pointer, so far. I had instability, especially over the Chrome browser tabs.

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  4. 2020 - Ubuntu 18.04

    The problem here was because of I have Dell's laptop and Dells's Monitor, there isn't any "unknown display".

    The Ubuntu wasn't recognizing the laptop as "built in".

    After setup everything and restart the laptop, all works fine.

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