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Tags: boot   grub2   display-resolution   18.10  
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Title: How can I change the resolution of the GRUB menu?
ID: /2018/11/27/How-can-I-change-the-resolution-of-the-GRUB-menu_
Created: November 27, 2018    Edited:  June 12, 2020
Upload: November 24, 2022    Layout:  post
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You can use 1920x1080 screen size but you will want to generate a larger font. Although the following GIF uses grub themes for additional graphics, generating larger 24 or 36 point fonts is the same for regular grub.

Grub Boot

Make Grub fonts

Even if you are just using regular grub, if you want a different font you must use grub-mkfont program first. The same holds true for Grub Customizer used by OP and Grub Themes used in first section of this answer.

Here are the fonts I have made for grub to use:

$ ll /usr/share/grub/themes/Tuxkiller2/*.pf2
-rwxrwx--- 1 root root 176923 Jun  9 16:41 /usr/share/grub/themes/Tuxkiller2/dejavu_14.pf2*
-rwxrwx--- 1 root root  20041 Jun  9 16:41 /usr/share/grub/themes/Tuxkiller2/droidlogo_bold_17.pf2*
-rwxrwx--- 1 root root  23339 Jun  9 16:41 /usr/share/grub/themes/Tuxkiller2/droidlogo_bold_20.pf2*
-rwxrwx--- 1 root root  31498 Jun  9 16:41 /usr/share/grub/themes/Tuxkiller2/droidlogo_bold_26.pf2*
-rwxrwx--- 1 root root  15244 Jun  9 16:41 /usr/share/grub/themes/Tuxkiller2/droidlogo_regular_12.pf2*
-rwxrwx--- 1 root root  19148 Jun  9 16:41 /usr/share/grub/themes/Tuxkiller2/droidlogo_regular_17.pf2*
-rwxrwx--- 1 root root 113623 Jul 11 17:05 /usr/share/grub/themes/Tuxkiller2/ubuntu_bold_italic_36.pf2*
-rwxrwx--- 1 root root  45391 Jul 11 17:08 /usr/share/grub/themes/Tuxkiller2/ubuntu_light_20.pf2*
-rwxrwx--- 1 root root  41020 Jul 11 17:16 /usr/share/grub/themes/Tuxkiller2/ubuntu_regular_18.pf2*
-rwxrwx--- 1 root root  46423 Jul 11 17:16 /usr/share/grub/themes/Tuxkiller2/ubuntu_regular_20.pf2*
-rwxrwx--- 1 root root  68602 Jul 11 16:59 /usr/share/grub/themes/Tuxkiller2/ubuntu_regular_28.pf2*

To create a font use the grub-mkfont program like this guide outlines: Increase Font in GRUB for High DPI Screens:

sudo grub-mkfont --output=/boot/grub/fonts/DejaVuSansMono24.pf2 \
  --size=24 /usr/share/fonts/truetype/dejavu/DejaVuSansMono.ttf

Then in your /etc/default/grub configuration file tell it to use the new .pf2 font file:

# More readable font on high dpi screen, generated with
# sudo grub-mkfont --output=/boot/grub/fonts/DejaVuSansMono24.pf2 \
#    --size=24 /usr/share/fonts/truetype/dejavu/DejaVuSansMono.ttf

Finally run:

sudo update-grub
⇧ Is there a linux equivalent to Mac's "Shake to Find Cursor"? Error for no default plymouth  ⇩