Odissey G9 flicker at 240hz:

Odissey G9 at 240hz flicker fix

#Odissey G9 flicker at 240hz:
-> add this as grub boot argument to fix resolution on VTs:
video=DP-1:2560x1440@120

-> Systemd unit:
#localhost:~ # cat /etc/systemd/system/fixres.service 
[Unit]
Description=Fix Resolution

[Service]
Type=oneshot
ExecStart=/usr/bin/fixres

[Install]
WantedBy=multi-user.target

-> Script that systemd unit calls: (it may be 1 or 0, in my case its 0)
#localhost:~ # cat /usr/bin/fixres 

#!/bin/bash
cat /root/MYEDID >/sys/kernel/debug/dri/1/DP-1/edid_override
echo 1 >/sys/kernel/debug/dri/1/DP-1/trigger_hotplug 

#get MYEDID on the bellow link and place into /root
#https://gitlab.freedesktop.org/drm/amd/-/issues/1442#note_1017689


-> Make script executable and enable and start the systemd service:
chmod +x /usr/bin/fixres
systemctl enable fixres.service
systemctl start fixres.service