This document will explain how to fix an Ubuntu screen that appears to be enlarged/zoomed in. This document will require the use of the terminal the GRUB to fix the issue.


The following link contains the source used to help troubleshoot an enlarged/zoomed in Ubuntu Screen (the section of the link being used at the time of documenting contains 10 likes): Failed to get size of gamma for output default when trying to add new screen resolution


Note: 
Before proceeding with this document, be sure to have configured the BIOS setting. If the BIOS setting has not been configured, refer to the Configuring the BIOS Setting document.



Note: 
The image above shows the issue that may occur when beginning to use another kernel that has been downloaded and installed. If a new/compatible kernel has not been installed, refer to the How to Change the Kernel document.



Step 1:

Open a new terminal and enter the following to check the current resolution:
$ xrandr


Step 2:

Enter the following into the terminal to open the GRUB text file to make changes to fix the resolution (look for the line of code in the text file shown in the image):
$ sudo nano /etc/default/grub


Step 3:

After finding the line of code from the image in step 2, enter the following to change the resolution:
Change:
#GRUB_GFXMODE=640X480

to:

GRUB_GFXMODE=####X####


Note: 
The '#' stand for the resolution number that should be used to fix the image. In this example, the resolution was changed to 1680x1050.



Step 4:

After changing the line of code to the correct resolution, press '
CTRL + O + Enter' to save the changes and 'CTRL + X' to exit out of the text file.





Step 5:

In the terminal, enter the following to update the changes made into the GRUB and reboot the COBOTTA:



$ sudo update-grub
$ sudo reboot





Step 6:

Once Ubuntu has been loaded in, log into Ubuntu and open a new terminal to enter the following to check if the resolution has been updated:



$ xrandr




This concludes the Fixing an Enlarged/Zoomed in Ubuntu Screen document. Proceed onto the Installing the COBOTTA Driver document.


Finished