stevan44
Posts: 3
Joined: Tue Mar 24, 2020 1:02 pm

Pi 4 and LineageOS 16

Tue Mar 24, 2020 1:14 pm

I can't get my monitor to display anything other the the rainbow screen screen. I have a Dell P2414H (1080p)monitor that will support 1280x720. I have the config.txt set for hdmi_group=2 and hdmi_mode=85.

The monitor is connected using a DVI connection with a adapter to HDMI. Is there something else I can do to see the monitor screen as the Raspberry LCD does?

fruitoftheloom
Posts: 23132
Joined: Tue Mar 25, 2014 12:40 pm
Location: Delightful Dorset

Re: Pi 4 and LineageOS 16

Tue Mar 24, 2020 4:48 pm

stevan44 wrote:
Tue Mar 24, 2020 1:14 pm
I can't get my monitor to display anything other the the rainbow screen screen. I have a Dell P2414H (1080p)monitor that will support 1280x720. I have the config.txt set for hdmi_group=2 and hdmi_mode=85.

The monitor is connected using a DVI connection with a adapter to HDMI. Is there something else I can do to see the monitor screen as the Raspberry LCD does?

Try a HDMi to DVi Cable ( no adaptors ):
Rather than negativity think outside the box !
RPi 4B 4GB (SSD Boot)..
Asus ChromeBox 3 Celeron is my other computer...

stevan44
Posts: 3
Joined: Tue Mar 24, 2020 1:02 pm

Re: Pi 4 and LineageOS 16

Wed Mar 25, 2020 2:49 pm

Thanks for the suggestion but, I tried to connect to my TV using HDMI. I changed the group to CEA and selected a mode for that category, but got the same results. So its not an issues at the physical layer.

I think its has to do with the EDID.dat file that has the resolution configuration settings. I do see the file on the SD card or its corrupt.

stevan44
Posts: 3
Joined: Tue Mar 24, 2020 1:02 pm

Solved *** Re: Pi 4 and LineageOS 16

Fri Mar 27, 2020 3:52 pm

It was not the Edid.dat file, but serial console configuration that was interfering with the HDMI not working.

:arrow: Go to the config.txt file under Boot directory and change "enable_Uart=1" to 0. It is turn on by default.

:D I hope that this will help others who are having the same issue with HDMI 0 not display correctly. Please remember that you have to use 720p solutions due to the graphics driver limitation. I hope one day that a higher resolution driver can be used.

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