Recalbox RGB/Scart Output kein Bild

[lackyluuk]

@funkybunch okay, lass uns mal @Substring fragen

@Substring He uses a "RGB output" connnected to GPIO (see link in first post) Does this work somehow in recalbox?

[funkybunch]

Das ist übrigens das Interfaceboard für den Scartanschluss.
https://www.pictastar.com/view/1488285698025119501

Und hier die genauen Infos.
http://strike-devices.net/index.php/pi2scart/

[funkybunch]

@lackyluuk Sorry, dass ich jedes mal @ nickname vergesse.

[Substring]

@lackyluuk rgb out connected to gpio ??? You mean the DPI interface ?

[funkybunch]

@Substring Hi. I tried diffferent options last night. But with the Recalbox image i get no picture (i only hear sound after booting). With retropie or other distributions it works. the same settings in Recalbox won't. So i copied the settings from RGB-Pi (which works also) and copied it to my boot partition. but i get the same problem. i've commented the force hdmi output and tried to set to zero, but without success.
I can not even see the noobs screen

[ian57]

@substring : Smallcab will perhaps lend me a Pi2scart module to make the support for recalbox. When arrived I will make some tests and write a mini howto for this module.

[Substring]

@funkybunch please paste your config.txt. I guess it's an overlay problem

[funkybunch]

@Substring i made the additional entry's from my starting post at the end of the config text on boot partition. disable "force hdmi" did not help.
I can post my complete config tonight.

[Substring]

@funkybunch I'm pretty sure it's an overlay problem. Does the vga666.dtb(o) exist in /boot/overlays ?

[funkybunch]

@Substring Yes, the vga666.dtbo exists

[funkybunch]

@Substring

So this is my full config.txt

#uncomment if you get no picture on HDMI for a default "safe" mode
#hdmi_safe=1

#disable_overscan=1

#uncomment to force a specific HDMI mode (this will force VGA)
#hdmi_group=1
#hdmi_mode=1

#comment to get jack audio
#hdmi_drive=2

#config_hdmi_boost=0

#force hdmi while the tv can take time before sending the signal on the hdmi output
#hdmi_force_hotplug=1

#uncomment for composite PAL
#sdtv_mode=2

#uncomment for lirc-rpi
#dtoverlay=lirc-rpi

#if you plug your tv at the same time as your rpi and that the rpi switches from the hdmi or give a low resolution because tv had no enough time to initialize it
boot_delay=3

#uncomment if you don't want the rainbow at startup
disable_splash=1

#Overclock
gpu_mem_256=128
gpu_mem_512=256
gpu_mem_1024=512

avoid_safe_mode=1

kernel=zImage

disable_audio_dither=1
dtparam=audio=on
dtoverlay=vga666
enable_dpi_lcd=1
display_default_lcd=1
dpi_group=2
dpi_mode=87
hdmi_timings=320 1 16 30 34 240 1 2 3 22 0 0 0 60 0 6400000 1 #240p

[Substring]

@funkybunch I've already been told about the dpi24 overlay not working with recalboxfs ... I guess this could just be because of our "old" kernel, but can't tell for sure

But remove the #240p from your hdmi_timings line. Also just try usual CEA/DMT mode that should fit your monitor (but write dpi_mode and dpi_group instead of hdmi_mode and hdmi_group)

[funkybunch]

@ian57 said in Recalbox RGB/Scart Output kein Bild:

@substring : Smallcab will perhaps lend me a Pi2scart module to make the support for recalbox. When arrived I will make some tests and write a mini howto for this module.

I look forward to hearing from you soon

[Substring]

@funkybunch have you read my answer ?

[funkybunch]

@Substring said in Recalbox RGB/Scart Output kein Bild:

@funkybunch have you read my answer ?

Yes i'm pretty shure i tried this way yesterday without success but i'll try it later again.

[funkybunch]

@Substring now i made the update to 4.1 unstable before i change the settings for using with a CRT. Now it Works! i have to set the overscan correctly, but that's not a big deal. When i finished, i can post the final config.txt

[Substring]

@funkybunch i'm not sure overscan will have the desired effect (something i must try), but porchs should do it

[funkybunch]

@Substring i thinks that is the best solution. Do you know a source which explains all parameter of hdmi_timings?

[Substring]

@funkybunch there is definitely none. It's all try'n'die. You'll just find the meaning of eachvalue, but their influence is very hard to explain.

What I can tell you is that playing on porchs moves the picture.

• if you want to move the screen to the left, increase the horizontal porch by one and decrease the back porch by one
• you can of course change this to move to the right
• playing on vertical porch moves the picture up and down.

Having a perfect full screen picture is almost impossible. Anyway that's siomething we're working on, but the result should come after 4.1 stable

[funkybunch]

@Substring it's annoying to set up (a setup tool with a test image, wich change the setting step by step would be nice. i've seen something on the pi2jamma distribution) but ok.
the picture is not really perfect

the more i try to optimize my settings the more i find projects with recalbox on crt's. so it would be really nice if recalbox get an easy setup for crt's in future (with version 4.2 or 4.3 eventually)