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How To Set Up an Ultrawide Monitor on Ubuntu 18.04

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In this guide, we will walk you through the process of setting up an Ultrawide monitor on Ubuntu 18.04. This process involves identifying your connected monitor, generating the appropriate modeline for your desired resolution, and adding this new mode to your monitor.

Quick Answer

To set up an Ultrawide monitor on Ubuntu 18.04, you need to identify your monitor using the xrandr command, generate a modeline using the gtf command, add the new mode using xrandr --newmode, associate the new mode with your monitor using xrandr --addmode, and finally set the monitor to the new mode using xrandr --output.

Prerequisites

Before we begin, it’s important to verify that your graphics card supports the resolution you want to set. Not all graphics cards or drivers may support ultrawide resolutions. You can check the maximum resolution supported by your graphics card by referring to its documentation or the manufacturer’s website.

Also, ensure you’re using the proper cable, such as DisplayPort, and avoid using adapters whenever possible, as they can sometimes lead to issues with resolution settings.

Step 1: Identifying Your Monitor

First, we need to identify the connected monitor. This can be done using the xrandr command. Open your terminal and type:

xrandr

This command will display all the connected monitors along with their current resolutions. Note the name of your monitor. For the purpose of this guide, let’s assume the name of the monitor is “HDMI-0”.

Step 2: Generating the Modeline

Next, we need to generate the modeline for our desired resolution and refresh rate. The gtf command is used for this purpose. In this case, we want a resolution of 3440×1440 at 60Hz. Type the following command in your terminal:

gtf 3440 1440 60

This command will output a modeline that looks something like this:

Modeline "3440x1440_60.00" 419.11 3440 3688 4064 4688 1440 1441 1444 1490 -HSync +Vsync

The “3440x1440_60.00” is the name of the mode, and the numbers following it are parameters that define the mode’s characteristics.

Step 3: Adding the New Mode

Now we need to add this new mode using the xrandr --newmode command. Replace “MODELINE GOES HERE” with the modeline generated in the previous step. For example:

xrandr --newmode "3440x1440_60.00" 419.11 3440 3688 4064 4688 1440 1441 1444 1490 -HSync +Vsync

This command adds the new mode with the specified parameters to the X Server.

Step 4: Associating the New Mode with Your Monitor

Next, we need to associate the new mode with our monitor using the xrandr --addmode command. Replace “MONITOR_NAME” with the name of your monitor (in this case, HDMI-0), and “MODE_NAME” with the name of the mode you created in the previous step (3440x1440_60.00).

xrandr --addmode HDMI-0 3440x1440_60.00

Step 5: Setting the Monitor to the New Mode

Finally, we can set the monitor to the new mode using the xrandr --output command. Again, replace “MONITOR_NAME” with the name of your monitor and “MODE_NAME” with the name of your mode.

xrandr --output HDMI-0 --mode 3440x1440_60.00

This command will set your monitor to the new resolution.

Troubleshooting

If your monitor goes black or you encounter any issues, you may need to revert to the previous resolution. This can be done by using the xrandr --output command with the previous resolution.

Conclusion

Setting up an Ultrawide monitor on Ubuntu 18.04 involves a few steps but can be done quite easily with the right commands. Always ensure your hardware supports the desired resolution before attempting to set it. If you follow these steps, you should be able to enjoy your Ultrawide monitor to its fullest potential on Ubuntu 18.04.

How do I check if my graphics card supports ultrawide resolutions?

You can check the maximum resolution supported by your graphics card by referring to its documentation or the manufacturer’s website.

Can I use adapters to connect my ultrawide monitor?

It is recommended to use the proper cable, such as DisplayPort, and avoid using adapters whenever possible, as they can sometimes lead to issues with resolution settings.

What command should I use to identify my connected monitor?

You can use the xrandr command in the terminal to identify your connected monitor. Simply type xrandr and it will display all the connected monitors along with their current resolutions.

How do I generate the modeline for my desired resolution?

You can use the gtf command followed by the desired resolution and refresh rate. For example, gtf 3440 1440 60 will generate the modeline for a resolution of 3440×1440 at 60Hz.

How do I add the new mode to my monitor?

You can use the xrandr --newmode command followed by the modeline generated in the previous step. For example, xrandr --newmode "3440x1440_60.00" 419.11 3440 3688 4064 4688 1440 1441 1444 1490 -HSync +Vsync will add the new mode with the specified parameters to the X Server.

How do I associate the new mode with my monitor?

You can use the xrandr --addmode command followed by the name of your monitor and the name of the mode you created in the previous step. For example, xrandr --addmode HDMI-0 3440x1440_60.00 will associate the new mode with the monitor named HDMI-0.

How do I set my monitor to the new mode?

You can use the xrandr --output command followed by the name of your monitor and the name of your mode. For example, xrandr --output HDMI-0 --mode 3440x1440_60.00 will set your monitor to the new resolution.

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