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HDMI Mode

Set the right HDMI Mode manually: Current HDMI state:

$ tvservice -s

List of CEA supported modes:

$ tvservice –m CEA

List of DMT supported modes:

$ tvservice –m DMT

Choose the prefered mode like:

(prefer) mode 85: 1280x720 @ 60Hz 16:9, clock:74MHz progressive

Open config file:

$ sudo nano /boot/config.txt

Change:

hdmi_group=2
hdmi_mode=85

Reboot:

$ sudo reboot