Occasionally, when I power up my friendly RPi, the screen stays blank as if there is no output from the HDMI. I can still
ssh to the device, so it is working.
Can anyone suggest reasons why it may be happening and how to fix it?
Raspberry Pi Stack Exchange is a question and answer site for users and developers of hardware and software for Raspberry Pi. It only takes a minute to sign up.Sign up to join this community
This was due to incorrect settings in
Actually deleting the config file solved my issue, but its purpose and possible parameters are documented here.
The contents of my file were:
hdmi_mode=19 #arm_freq=800 disable_overscan=1
This is what comes by default in Arch. The
hdmi_mode=19 setting sets the HDMI output to
1024x768 85Hz, which is apparently an unsupported resolution for my monitor.
I believe that deleting the file sets the output to
hdmi_mode=1, which is
VGA. Clearly this is suboptimal, so I recommend experimenting to find the best value.
Another possibility I came across is that I didn't get any display unless the HDMI cable was plugged in before the Pi was switched on.
Should be a relatively quick one to fault-find, but worth documenting here nonetheless.