Grub2 boot menu low resolution

Ask Fedora
, ,
1

Hi Fedora community,

I’ve recently changed from Manjaro to Fedora and can’t seem to get the grub2 boot menu to display at native 4k resolution. It looks like 1024x768x32. I was able to theme Manjaro and change the resolution of the Grub menu, but I do believe it wasn’t running on UEFI, unsure really.

I’ve already tried a number of things and am not sure what to do next or if I just have to accept this. At the end, it is only aesthetics.

Some data:

  • ROG STRIX B550-E GAMING with latest firmware
  • AMD Radeon RX6700 XT
  • Latest Fedora 35
  • Fastboot disabled
  • CSM Boot Disabled
  • Secure boot set to Other OS
  • Boot Logo set to auto

Content of /etc/grub/default:

GRUB_TIMEOUT="5" 
GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)" 
GRUB_DEFAULT="saved" 
GRUB_DISABLE_SUBMENU="true" 
GRUB_CMDLINE_LINUX="rhgb quiet video=efifb:mode=0,efifb:nobgrt fbcon=nodefer " 
GRUB_DISABLE_RECOVERY="true" 
GRUB_ENABLE_BLSCFG="true" 
GRUB_TERMINAL_OUTPUT="console"

What I tried so far:

  • I’ve read GRUB 2 - Fedora Project Wiki and tried setting GRUB_GFXPAYLOAD_LINUX and GRUB_GFXMODE to various settings
  • I’ve read a thread in this forum and added the linux settings video=efifb:mode=0 - which appears to work looking at dmesg [ 0.793565] efifb: mode is 3840x2160x32, linelength=15360, pages=1
  • I’ve toggled the UEFI settings mentioned above
  • I’ve tried looking up the videomode in grub shell but both vbeinfo and videoinfo error out with error: ..../grub-core/script/function.c:119:can't find command
  • I also ran hwinfo --framebuffer --log hwinfo.log but am unable to find any reference to video modes (I grepped for mode, video etc.)
  • I’ve asked on Reddit
  • Read through this forum and found a few related threads Low resolution grub2 and tty but they had no resolution

I am a bit out of ideas. Could it be that running in UEFI mode my graphics card + Monitor via DP + mainboard just don’t support a higher resolution?

Thank you for your help! This is my first post so I hope I didn’t forget anything. Happy to answer any questions!

4 Likes