Grub2 boot menu low resolution

[rokejulianlockhart (Mr. Beedell, Roke Julian Lockhart)]

I’ve ascertained the problem and how to remediate it.

Specifically, GRUB_GFXMODE=, despite being unset, defaults to approximately 640x480 px. However, adding GRUB_GFXMODE=2560x1440 forces it to render at my monitor’s native resolution (obviously, 2560x1440 px). You may need to add GRUB_TERMINAL_OUTPUT="gfxterm" too, like the undermentioned demonstrates:

GRUB_TIMEOUT=10
GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
GRUB_DEFAULT=saved
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT="gfxterm"
#GRUB_CMDLINE_LINUX=""
#GRUB_DISABLE_RECOVERY="true"
GRUB_ENABLE_BLSCFG=true
GRUB_GFXMODE=2560x1440

Unfortunately, this isn’t perfect, because the value must be modified for the display in use, which can change. However, auto may remediate this if the correct value is acquired by it, and setting fallbacks (like GRUB_GFXMODE=2560x1440,1600x1200) at least prevents it rendering in a manner which unobservable.

I’m following boot - GRUB2: Use maximum detected resolution? - Ask Ubuntu for a perfect way to dynamically acquire the display resolution and apply that, but there has been no such response yet.

@tolotifant, if this works for you, please mark this as the answer.

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Now, all that needs to be done is scale it. I’ve asked at the undermentioned how to accomplish this:

Can GRUB2 be scaled? If so, how?

Rationale As the undermentioned quotation demonstrates, I’ve ascertained how to force GRUB2 to render at the correct resolution for my monitor: However, because it’s scaled at 100%, it’s quite small. Consequently, I want to scale it. Whether solely integer scaling or fractional scaling is available in addition is insignificant to me, because 200% is acceptable. Duplicates A Reddit post also asks this, to no avail. I’ve asked unix.stackexchange.com/q/787374/386242.