Ubuntu – Ubuntu showing sched_error 20[ ] on boot


I am seeing the below message during boot, preventing my system from running:

** 19 printk messages dropped **
[200.119021] nouveau <missing> fifo: sched_error 20[<missing>]

How can I fix this?

Best Answer

Upon boot, add nouveau.modeset=0 to the command-line arguments. Do this like so:

  1. When booting your computer, hold down SHIFT to get a GRUB menu.
  2. Navigate to the Ubuntu option and hit F3.
  3. Move your cursor to the linux line, after quiet splash.
  4. Type in nouveau.modeset=0, and then hit F10.

When you've booted into your computer, you're going to have to either install the NVIDIA drivers or update your boot config to not allow this error to happen further:

  1. Open a terminal with Ctrl+Alt+T.
  2. Type in the following command, exactly as it appears below:

    sudo nano /etc/default/grub
  3. You will be prompted with something that looks like [sudo] password for user:. Type in your password. You will not see any characters, but rest assured that your password is being typed. Press ENTER when done.

  4. Go to this line:

    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"  

    Edit it to look like:

    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nouveau.modeset=0"
  5. Press Ctrl+X, followed by the Y key, followed by the ENTER key to save your changes.

  6. Run the exact command below to update your bootloader config:

    sudo update-grub
  7. Reboot to confirm that everything is working properly.

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