On 25/04/2017 08:36, jack4747@gmail.com wrote:
> Il giorno lunedì 24 aprile 2017 19:00:21 UTC+2, Andrew Gabriel ha scritto:
>>> Would a Pi work to use a TV as a monitor?
>>
>> Yes.
>> Make sure you connect up the HDMI lead to the monitor before
>> you power-on the Pi, or it won't use the HDMI video output.
>
> there is a config.txt command to force HDMI on, even if no cable is connected
(google for it)

http://elinux.org/RPiconfig#Video_mode_options
Normally, if you already have the hdmi cable connected and the Pi
understands your TV's hdmi info which is almost always, you won't need
any of this. But to be absolutely sure, you need:

# Usually the next one does the trick but this to make sure
# that you can manually set any mode you like
# Why the large number and not just 0/1, I have no idea
hdmi_ignore_edid=0xa5000080

# The main "force hdmi" setting
hdmi_force_hotplug=1

# Now that you forced it and ignored auto settings, you need to specify
# an HDMI mode to use. 1 for TV modes with sound, 2 for computer monitor
# modes without sound, see the two long lists of modes in link above
hdmi_group=1

# 16 for 1080p 60 Hz (probably good in NTSC countries)
# 31 for 1080p 50 Hz (probably good in PAL countries)
hdmi_mode=31

You also need to do this for headless Pis to which you want to connect
with VNC, to avoid a standard 640x480 desktop.

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