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+--- Thread: How do I use both HDMI ports? (/showthread.php?tid=3943)
How do I use both HDMI ports? - Techstyle - 2022-03-06
I have had a monitor plugged into 'HDMI 0' for a year or so. Today I tried to plug a new, second monitor to 'HDMI 1'. The second monitor showed the "Welcome to raspberry pi desktop" splash screen but would not go beyond then and when I swapped the interfaces it followed 'HDMI 1' not the monitor. Anybody else had similar issues?
RE: How do I use both HDMI ports? - Techstyle - 2022-03-07
after reading some stuff online I uncommented:
Code:
dtoverlay=vc4-fkms-v3dat the same time, I also uncommented:
Code:
config_hdmi_boost=Xwhere X is whatever the default is, what I did see is some blinking and horizontal lines on the monitor at the helm (furthest away from the Pi) - at the time I had the helm monitor on HDMI0, the helm monitor on HDMI1 and VNC to a laptop. I didn't get time to play around with it to much but some more research leads me to believe I could play with the boost setting and also use:
Code:
dispmanx_offline=1still work in progress
RE: How do I use both HDMI ports? - gniersma - 2022-03-13
Hi,
i'm using the dual hdmi ports rasp pi 4 openplotter
I do have an outside monitor, it is the planar Mariner LX1501PTI / IP65 Toch Monitor. This one is build into a panel into my ship. It has proven to be very usefull so i don't want to lose this one. It is a 15" VGA monitor, with a maximum resolution of 1024 x 768 XGA 6 bit color dept, daylight and fully dimmable and single touch. So I use an VGA to HDMI convertor to connected to the HDMI1 port
Next to this i have an inside HDMI monitor on the navigation table connected tot HDMI0
this treath: https://forums.raspberrypi.com/viewtopic.php?t=244558 helped me to get it working
Hope this helps.
G.