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I can't control the font size on the grub screen. For example, if I do:

grub set gfxmode=1024x768x32

I get no change in the font size, and it remains tiny. Why is this?

There is much on the internet about changing font size by editing /etc/default/grub and doing 'update-grub' and similar, but there is nothing about doing it on-the-fly right in the grub terminal.

I'm running Ubuntu 20.04 on a Lenovo t400.

Thanks for reading this. Happy holidays!

tom arnall
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2 Answers2

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I did updates to grub.cfg via editing /etc/default/grub, but they didn't work. Finally, I found out what video card was on the machine with sudo lshw -c video which indicated AMD.

Suspecting that the drivers had never been installed, I used a procedure given at How To Install AMD Radeon Driver on Ubuntu 20.04 LTS. I used the second procedure, which has the heading Install AMD Radeon Driver using PPA third-party repository:

sudo add-apt-repository ppa:oibaf/graphics-drivers
sudo apt update
sudo apt upgrade

Indeed, the drivers had not been installed.

Following the procedure made the graphics perfect. I now have an Ubuntu 20.04 bootable USB (full install) which happily boots on my machine at work and liberates me from the horrors of Windows. I created the bootable on my Linux machine at home.

Greenonline
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tom arnall
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  • There only seems to be one procedure listed on the page that you link to, which has two steps. If you could [edit] your answer to actually include the steps that you followed, with the commands, then that would be more helpful. As it stands your answer is a bit of a link only answer, and if/when the link dies, your answer won't be as useful as it could have been. I have suggested an appropriate edit. – Greenonline Feb 09 '22 at 11:53
  • This is about graphics resolution, not about font size. – Szczepan Hołyszewski Sep 19 '22 at 06:41
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According to arunk's answer to "Can GRUB font size be customised?":

Follow these instructions:

  1. Make a backup: sudo cp -a /etc/default/grub /etc/default/grub.bak
  2. Open the configuration: sudo $EDITOR /etc/default/grub
  3. Edit GRUB_GFXMODE entry to suit your resolution e.g. 800x600
  4. sudo update-grub
  5. Reboot; GRUB will display in the mode you set.
G-Man Says 'Reinstate Monica'
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BugStrategy
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