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HDMI Force RGB Option
Issue Brief
With some TV monitors, there is a bug in their HDMI implementation that sometimes trigger the selection of the wrong colorspace in a magenta/green display.
It looks TV reports that is capable of YUV422 or YUV444 but it's not indeed.
To avoid this situation, you can use forcergb option to set COLORSPACE_SPACE_RGB444 forcely.
Here are the more investigations and discussions in ODROID Forum.
How to set boot.ini to activate forcergb
# Enable | Disable HDMI CEC Control setenv hdmi_cec "0" # Disabled # setenv hdmi_cec "1" # Enabled # setenv hdmi_cec "2" # Enabled but disable auto TV switching ON # Force HDMI to use RGB colorspace regardless of TV request # setenv hdmi_forcergb "0" # Disabled setenv hdmi_forcergb "1" # Enabled if test "${hdmi_cec}" = "0"; then setenv hdmitx "hdmitx=cec0"; fi if test "${hdmi_cec}" = "1"; then setenv hdmitx "hdmitx=cecf"; fi if test "${hdmi_cec}" = "2"; then setenv hdmitx "hdmitx=cec7"; fi if test "${hdmi_forcergb}" = "1"; then setenv hdmitx "${hdmitx},forcergb"; fi #setenv bootargs "${rootopt} ${consoleopt} hdmimode=${hdmimode} ${hdmitx} vout=${vout_mode} ............" setenv bootargs ${bootargs} ${hdmitx}