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I have been using Ubuntu for quite sometime now. I have a dual boot system with Windows 10 and Ubuntu 18.04. I have used this combo ever since Ubuntu 18.04 came out. Earlier, grub would always show and accept 1920x1080 as its display resolution. I have had various system crashes along the way due to which I have had to install Windows and Ubuntu thrice. Recently, I have noticed a peculiar thing. My grub doesn't show 1920x1080 resolution when I use videoinfo command at grub terminal. The highest that it goes is 1280x720. I have tried to fix it by manually making an entry in the grub file but it was of no help.

My grub file config is as follows:

Can anyone please suggest me a possible fix for it? Is there something wrong with the OS? Is there something wrong with the BIOS (MSI Motherboard)? Is there something wrong with the drivers?

Note: I am running in UEFI mode.

slava
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c2yCharlie
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2 Answers2

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Edit the file /etc/default/grub and find the line:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

Then change it to:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash video=hyperv_fb:1920x1080"

See that this will sort out your problem. Also note the advice at the beginning of the file:

If you change this file, run 'update-grub' afterwards to update /boot/grub/grub.cfg.

Eliah Kagan
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Munjunga
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There's very little video control at the GRUB screen level. It's best to leave /etc/default/grub at...

GRUB_GFXMODE=640x480

This parameter only effects the GRUB screen, and this setting will display large enough font characters for easy viewing.

Followed by...

sudo update-grub

Also see...

How to fix plymouth (splash screen) in all Ubuntu releases!

Nvidia Grub max boot resolution 1280x1024 (15.10)

Grub-Efi wrong resolution

heynnema
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