Ubuntu fix screen resolution

Discover this issue when I deployed PIS into IPC.
As per requirement, the display needs to be shown in 1920*1080  resolution. But, instead, Ubuntu shows 640*480 resolution.

How I solved this?

1. Update Ubuntu
   > sudo apt-get install
   
   
2. Open file
   > sudo nano /etc/default/grub
   
   
3. Change line
   
   #GRUB_GFXMODE = 640X480
   to
   GRUB_GFXMODE = 1920X1080
   
   
4. Save the edited file.
   
   
5. Update the file
   > sudo update-grub
   
   
6. Reboot the IPC
   > sudo reboot