Strange screen behavior, signal lost

[caobianco]

Hi guys, i have a screen problem :

https://www.youtube.com/watch?v=rm3zm6Kvjhk

at 5 or 10 seconds, this is happend.

my hardware :

Raspberry PI3
Memory Card 64 GB

Software

Recalbox 7.11

I change some points, in config.txt :

• hdmi_safe=1
• hdmi_group=1
• hdmi_mode=20
• config_hdmi_boost=11
• hdmi_force_hotplug=1
• sdtv_mode=3

i see this in :
https://www.raspberrypi.org/documentation/configuration/config-txt/video.md

in recalbox.config :

• system.es.videomode=CEA 31 HDMI
• global.videomode=CEA 31 HDMI

but here, i am using 20/16/5 but i am not have sucess.

Do you have any ideas ?

Sorry, my english is very bad, i know.

[caobianco]

My TV is a Sansung full HD un46d5500.
1920 x 1080 pixels, 120 Hz.

I change :

• hdmi cable.
• raspberry power supply.
• install a new recalbox.

But the problem persist.

[Zing]

@caobianco I recommend that you redo the installation of Recalbox, and, via SSH run the tvservice command, as it says at the end of the tutorial:

• https://recalbox.gitbook.io/documentation/tutorials/video/display-configuration/complete-guide-on-video-configuration

You may prefer the tutorial in Portuguese:

• https://recalbox.gitbook.io/documentation/v/portugues/tutoriais/video/configuracao-de-exibicao/guia-completo-de-configuracao-de-video

Realize that normally you only need to modify the lines:

hdmi_group=
hdmi_mode=

And, these must be filled in with the values that your monitor supports (or, you will have problems). The values you are currently setting in the config.txt file and in the recalbox.conf are different, and none of them appear to be the correct one.

In the recalbox.conf file, it will probably work best with the video mode settings set to default.

[caobianco]

@Zing said in Strange screen behavior, signal lost:

Realize that normally you only need to modify the lines:

Man, thanks for your response.

Well, i run a new setup, from zero

And, the signal only appears in my VGA monitor

In this monitor, the problem never happens...

Now i change the config.txt value to :
hdmi_group=1
hdmi_mode=5

[caobianco]

@caobianco said in Strange screen behavior, signal lost:

Now i change the config.txt value to :

in tvservice, the return is :
tvservice -m CEA
(prefer) mode 5
(native) mode 16

so, i change the value in config.txt to :
hdmi_group=1
hdmi_mode=16

and i change recalbox.conf to
global.videomode=CEA 16 HDMI

The problem stil in there.

Do you have any ideas ?

[Zing]

@Zing

and i change recalbox.conf to
global.videomode=CEA 16 HDMI

In the recalbox.conf file, it will probably work best with the video mode settings set to default.

Please test with global.videomode=default.

If that doesn't work, change hdmi_mode=5

(prefer) mode 5

And what was the result of tvservice -m DMT ?

In the recalbox.conf file, you can change the line (remove the semicolon from the front of the line to make the change work):
;system.es.videomode=

[caobianco]

tvservice DMT return

I am not re-config the recalbox, with your tips yet.

[caobianco]

In a config.txt now :
disable_overscan=1
hdmi_group=1
hdmi_mode=5
hdmi_drive=2
config_hdmi_boost=0
all other parameter are coment, with #.

In recalbox.conf:
global.videomode=default
system.es.videomode=CEA 5 HDMI

The problem still happens.

[caobianco]

tvservice -s
state 0xa [HDMI CEA (5) RGB lim 16:9], 1920x1080 @ 60.00Hz, interlaced

[Zing]

@caobianco said in Strange screen behavior, signal lost:

in tvservice, the return is :
tvservice -m CEA
(prefer) mode 5
(native) mode 16

Just to confirm:
You ran the tvservice command with the problematic TV, right?

system.es.videomode=CEA 5 HDMI

If this setting didn't work, comment it (add the semicolon in front of the line again, this will ignore this setting)

Do you say you tried with another HDMI cable, what type of HDMI cable (1.4, 2.0, 2.1)?

Does this TV work normally with this cable on other devices?

Is there a setting on the TV to lower its resolution?

According to the documentation, your TV's videomode should be:
hdmi_mode=46
or
hdmi_mode=63

Test with these modes (obviously you need to restart after each change).

If none of this works, it could be a problem with the frequency of this TV (120 Hz may be too high for the Rpi).

[caobianco]

@Zing , I apologize to you.
The problem is in fact on television.
I put other devices on and the problem persists.
I'm sorry and thanks for your help.