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How To Set ‘nomodeset’ in Grub2 After Installing Ubuntu

Ubuntu 8

In this guide, we’ll walk through the steps to set the ‘nomodeset’ parameter in Grub2 after installing Ubuntu. This parameter can be necessary to troubleshoot issues related to graphics cards and drivers.

Quick Answer

To set ‘nomodeset’ in Grub2 after installing Ubuntu, open a terminal and run the command ‘sudo nano /etc/default/grub’ to edit the Grub configuration file. Add ‘nomodeset’ to the line starting with ‘GRUB_CMDLINE_LINUX_DEFAULT’, save the changes, and exit. Finally, update Grub by running ‘sudo update-grub’. Reboot your system, and the ‘nomodeset’ option will be set. This can help troubleshoot graphics card and driver issues.

What is ‘nomodeset’?

The ‘nomodeset’ parameter instructs the kernel to not load video drivers and use BIOS modes instead until X is loaded. This is often useful for resolving issues related to the display and graphics drivers, especially when you’re unable to boot into Ubuntu due to such problems.

Step 1: Open Terminal

The first step is to open a terminal. You can do this by pressing Ctrl + Alt + T or by searching for ‘Terminal’ in the applications menu.

Step 2: Edit the Grub Configuration File

Next, we’ll edit the Grub configuration file. Run the following command in the terminal:

sudo nano /etc/default/grub

Here, sudo is used to execute the command with root privileges. nano is a simple, user-friendly text editor in Linux, and /etc/default/grub is the path to the Grub configuration file.

Step 3: Add ‘nomodeset’ to Grub Parameters

In the configuration file, locate the line that starts with GRUB_CMDLINE_LINUX_DEFAULT. This line contains the default parameters that Grub passes to the kernel at boot time.

Add nomodeset to the list of parameters, ensuring that it’s separated from any existing parameters by a space. The line should now look like this:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset"

Here, quiet reduces the number of messages shown during boot, splash enables the splash screen, and nomodeset is the parameter we’re adding.

Step 4: Save Changes and Exit

After adding the ‘nomodeset’ parameter, save the changes by pressing Ctrl + O, then exit nano by pressing Ctrl + X.

Step 5: Update Grub

Finally, we need to update Grub to apply the changes we made. Run the following command in the terminal:

sudo update-grub

This command generates a new Grub configuration file based on the default settings and the changes we made.

Conclusion

After completing these steps and rebooting your system, the ‘nomodeset’ option will be set for Ubuntu. This can help resolve issues related to graphics drivers and allow you to boot into Ubuntu successfully.

Remember to be cautious when editing system files, as incorrect modifications can cause boot issues. If you encounter any problems, you can revert the changes by following the same steps and removing the ‘nomodeset’ option.

For more information on Grub and its configuration, you can refer to the Grub Manual.

How do I open a terminal in Ubuntu?

To open a terminal in Ubuntu, you can press Ctrl + Alt + T or search for ‘Terminal’ in the applications menu.

What is the Grub configuration file?

The Grub configuration file is located at /etc/default/grub and contains the default parameters that Grub passes to the kernel at boot time.

What does the ‘nomodeset’ parameter do?

The ‘nomodeset’ parameter instructs the kernel to not load video drivers and use BIOS modes instead until X is loaded. This can help troubleshoot issues related to graphics cards and drivers.

How do I add the ‘nomodeset’ parameter to Grub?

To add the ‘nomodeset’ parameter to Grub, open the Grub configuration file using a text editor like nano by running sudo nano /etc/default/grub. Locate the line starting with GRUB_CMDLINE_LINUX_DEFAULT and add nomodeset to the list of parameters, separated by a space. Save the changes and update Grub using sudo update-grub.

How do I revert the changes if I encounter any problems?

If you encounter any problems after adding the ‘nomodeset’ parameter, you can revert the changes by following the same steps and removing the ‘nomodeset’ option from the line starting with GRUB_CMDLINE_LINUX_DEFAULT. Save the changes and update Grub using sudo update-grub.

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