Hi @AnuragBluAI !
Welcome to Toradex Community! Feel free to browse around! 
Are you using
Since you are on Mallow, you are using the X14 HDMI connector, which is the native HDMI. Currently, on Torizon OS 7, a bug on Weston container was found and it is being worked on.
A current workaround is to set WESTON_DISABLE_ATOMIC=1. For instance:
docker container run -d --name=weston --net=host --cap-add CAP_SYS_TTY_CONFIG -v /dev:/dev -v /tmp:/tmp -v /run/udev/:/run/udev/ --device-cgroup-rule="c 4:* rmw" --device-cgroup-rule="c 253:* rmw" --device-cgroup-rule="c 13:* rmw" --device-cgroup-rule="c 226:* rmw" --device-cgroup-rule="c 10:223 rmw" --device-cgroup-rule="c 199:0 rmw" -e WESTON_DISABLE_ATOMIC=1 torizon/weston-imx8:4 --developer
Please note that this currently is just a workaround.
EDIT: There is another workaround, which involves removing the --current-mode from the entry.sh script of the weston container (torizon-containers/support-files/weston/entry.sh at stable · torizon/torizon-containers · GitHub) and rebuilding it. Although it is more work, I was informed that this a better approach from the technical point of view.
Best regards,