Change kernel parameters?

[bcookatpcsd]

Sorry if this isn't the right place.. brand new to this.. got it going on a local pc in about an hour; very happy.

I'd like to add a kernel parameter, and I can by editing grub at boot, but I've mount -o remount,rw /dev/nvme0n1p3 and edited the /boot/efi/boot/grub.cfg and /boot/syslinux/root.A.cfg and default.cfg.. nothing seems to stick and I can't understand why..

Also I was able to load my Brother 5450DN drivers.. but can not print, is printing an issue?

localhost /boot/efi/boot # cat /etc/lsb-release
CHROMEOS_RELEASE_BOARD=amd64-atb
CHROMEOS_DEVSERVER=http://chromeota.arnoldthebat.co.uk:8080
GOOGLE_RELEASE=13310.80.2020_09_14_1659
CHROMEOS_RELEASE_BUILD_NUMBER=13310
CHROMEOS_RELEASE_BRANCH_NUMBER=80
CHROMEOS_RELEASE_CHROME_MILESTONE=85
CHROMEOS_RELEASE_PATCH_NUMBER=2020_09_14_1659
CHROMEOS_RELEASE_TRACK=developer-build
CHROMEOS_RELEASE_KEYSET=devkeys
CHROMEOS_RELEASE_NAME=Chromium OS
CHROMEOS_RELEASE_BUILD_TYPE=Developer Build - tonyd
CHROMEOS_RELEASE_VERSION=13310.80.2020_09_14_1659
CHROMEOS_AUSERVER=http://chromeota.arnoldthebat.co.uk:8080/update
CHROMEOS_RELEASE_DESCRIPTION=13310.80.2020_09_14_1659 (Developer Build - tonyd) developer-build amd64-atb

also /var/log/messages.. spammed with this:

2020-09-17T18:39:32.149366-04:00 WARNING tpm_managerd[820]: TSS: Failed unix connect: /run/tcsd/tcsd.socket - No such file or directory
2020-09-17T18:39:32.149460-04:00 WARNING tpm_managerd[820]: TSS: Got a list of valid IPs
2020-09-17T18:39:32.149535-04:00 WARNING tpm_managerd[820]: TSS: Could not connect to machine: localhost
2020-09-17T18:39:32.149574-04:00 ERR tpm_managerd[820]: TSS: Could not connect to any machine in the list.
2020-09-17T18:39:32.149616-04:00 ERR tpm_managerd[820]: TSS: Failed to send packet

Thanks in advance