Grub quiet loading screen not working

[blissful juniper]

I am trying to modify the loading screen after boot selection, but I keep getting logs of "loading LMDE 6", then a couple more lines, then jumps to Mint Boot Logo, back to a couple more lines of logs, then back to Mint Boot Logo.

I edited grub under /etc/default/grub..

GRUB_DEFAULT=0
GRUB_TIMEOUT=3
GRUB_DISTRIBUTOR=lsb_release -i -s 2> /dev/null || echo Debian
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX=""

I also ran "sudo update-grub"..

but no change, still booting up the same way. I will try to get some pictures of the booting screen with logs.

[green skiff]

errors, even non-fatal ones will always show visibly

[blissful juniper]

any way I can either fix them or hide them?

[green skiff]

you can try looking up what they mean n see but idk

something timed out. could be a missing physical device not present that was present during install

wild guess

[blissful juniper]

"The same errors appear with Debian Testing. When I add the kernel parameter intel_iommu=off, the errors disappear"

found that on reddit post

but I don't know where to insert the line "intel_iommu=off"

apparently is trying to detect a tpm chip, which my laptop doesn't have

added the command to grub, but didn't do anything.

Update: GRUB_DEFAULT=0
GRUB_TIMEOUT=3
GRUB_DISTRIBUTOR=lsb_release -i -s 2> /dev/null || echo Debian
GRUB_CMDLINE_LINUX_DEFAULT="quiet"
GRUB_CMDLINE_LINUX="intel_iommu=off" This eliminated the TPM check, and no longer seeing the screen with error message, but the screen that shows "booting into LMDE 6" (Image 1) still shows, any idea if I can hide that screen?

[green skiff]

add the splash back

[blissful juniper]

added it, but didn't change a thing.. still shows

[green skiff]

may want to ask others who use LMDE, it's prob. normal