/home/bill/System_maintenance/HDMI notes.txt 12Dec2012 configure HDMI https://elinux.org/R-Pi_ConfigurationFile $ sudo nano /boot/config.txt >> I tried $ cat /boot/config.txt $ sudo leafpad /boot/config.txt +-----+ change : # uncomment to force a specific HDMI mode (this will force VGA) hdmi_group=1 hdmi_mode=31 # uncomment to force a HDMI mode rather than DVI. This can make audio work in # DMT (computer monitor) modes hdmi_drive=2 # uncomment to increase signal to HDMI, if you have interference, blanking, or # no display #config_hdmi_boost=4 +-----+ to : # uncomment to force a specific HDMI mode (this will force VGA) hdmi_group=2 hdmi_mode=68 # uncomment to force a HDMI mode rather than DVI. This can make audio work in # DMT (computer monitor) modes hdmi_drive=2 # uncomment to increase signal to HDMI, if you have interference, blanking, or # no display #config_hdmi_boost=4 +-----+ YIKES!! - didn't work (too high a resolution), so from safe mode I changed back again to original +-----+ to : # uncomment to force a specific HDMI mode (this will force VGA) hdmi_group=1 hdmi_mode=31 # uncomment to force a HDMI mode rather than DVI. This can make audio work in # DMT (computer monitor) modes hdmi_drive=2 # uncomment to increase signal to HDMI, if you have interference, blanking, or # no display #config_hdmi_boost=4 +-----+ # enddoc