cmdline.txt video=... not working as expected.

Hi,

Hardware: Pi4.

Sofware: LE11 latest stable version.

Steps to reproduce:

- SSH into Libreelec

- Mount /flash and edit cmdline.txt

LibreELEC:~ # mount -o remount,rw /flash
LibreELEC:~ # nano /flash/cmdline.txt

Locate end of cmdline.txt

Change: video=HDMI-A-1:D

to:

video=HDMI-A-1:720x576@50iD

Save (ctrl+y)

mount /flash readonly

mount -o remount,ro /flash

Reboot Librelec.

Expected result:

-> boot in 720x576 interlaced

Actual result:

-> boot in 720x576 progressive

That is wrong! it must be interlaced.

When Kodi boots all is well, because I have cloned the HDMI edid and I enforce a 720x576 interlaced resolution.

Full cmdline.txt below

boot=UUID=1108-5701 disk=UUID=3542a3ff-9e05-4d2b-80ce-0438958f4de6 quiet drm.edid_firmware=HDMI-A-1:edid/edid-HDMI-A-1.bin video=HDMI-A-1:720x576@50iD

I made two Screenshots. Look at upper left corner.

The Pi4 is connected to a flatscreen TV with it's HDMI input.

(if I connect it to my retro CRT I can take a picture of "no picture"during boot lol )

1. during boot (wrong):

2. When Kodi is started. (fine)

Am i overlooking something?

Is this a bug?

Would you want to try to reproduce this issue on your hardware for me?

Greetings & thanks for the effort!

Quote from Da Flex

LE doesn't support interlaced mode on RPi, so switching to progressive is expected.

Thanks for the answer,

I have a spare Intel NUC for testing.

So If I add:

720x576@50iD

to it's kernel boot parameter, it will output interlaced video during boot?

Quote from Da Flex

On Kodi level: no. Your question has been answered earlier:

Post

RE: Display boot logo Libreelec.

Kodi does not support interlaced output, only progressive. Anything you force via kernel DRM during boot will be overriden later.

chewitt

April 4, 2023 at 2:12 PM

Hi,

Thanks for the response.

I have the feeling we are talking over each other.

I'll try to clarify.

I understand that Kodi overrides the video output, but that's not my question.

1) I already have interlaced video output in Kodi. I cloned the HDMI edid from a TV and set resolution to 720x576i. Works fine.

2) I want interlaced output during boot too. I want to see the boot up screen and shutdown screen too.

Now I have:

->boot ->576 progressive ->Kodi Started-> 576 interlaced (good!) - Shutdown -> 576 progressive

I use the Pi4 for driving a CRT TV that only accepts 576 interlaced

So you understand why I am so hung up on it

So

720x576@50iD

on my Intel NUC would that work during boot level?

But not on the Pi4 for the boot level ?