@jose_alk I'm having the exact same problem, only there's no sound either! I have the official raspberry 7'' TFT screen, and it doesn't work on the screen or on HDMI.

Still haven't found a solution for this...
Anyone else has any idea?
I appreciate any help!

@substring It does, BUT when I do this step :

7. Edit "recovery.cmdline" in F:, add to the end of the line " dsi" , dont fortget the space-character, and save

Then it will work properly on HDMI when connected, PINN boots perfectly on HDMI, but then when Recalbox starts, the image is back on the LCD.

Then I do the next steps:

8. Go to F:\ and create a config.txt and add the line "ignore_lcd=1" and save

• when starting, the output will be forced onto hdmi with this command. PINN menu will only be visible on hdmi source now
• this is important, so the dsi display does not blink, while using hdmi

9. Mount sd card back into raspberry pi and start into rasbian.

10.Open terminal and go to /boot/

11. Create file "config.dsi" in /boot/ - this config will be loaded, when hdmi is not connected

• dsi display loads automatically and does not need any commands, so the config.dsi can be empty
• you can add later, what usually would go into config.txt to configure your dsi display

12. Create file "config.hdmi" in /boot/ - this config will be loaded, when hdmi is connected

• add line "ignore_lcd=1" to config.hdmi, this forces to ignore the dsi display

After that, it won't boot.

@substring I'm sad to report I couldn't get it to work
For some reason after doing everything described in the instructions, Recalbox won't even boot on a fresh install.

Alright, I was just thinking the same.
The PINN answer looks like a solid solution.
I will try it during the weekend and let you know how it went.
Thanks!

@substring Well I tried and I don't seem to find a complete answer...
I found this article on PINN. I'm not using it, but can this be "adapted" to use on Recalbox???
link text

Ok I confirm [EDID=*] doesn't work.
I hope I just got the syntax wrong, or there's something similar.

@substring That's not entirely crazy! I'll test that and see how it goes when I come back from work.
In the meantime, can you give me a link to the official Pi forum? Thanks!

I use the exact same one, works flawlessly!

@substring I think the answer is finding a way to have it detect HDMI and if detected run ignore_lcd=1 and if not detected, don't run it or change it to ignore_lcd=0

Well, I got it to work but only partially.
I added this to the config.txt:

[EDID=GSM-LG_TV]
ignore_lcd=1
hdmi_group=2
hdmi_mode=82
[all]

Now when the HDMI from my TV is connected before boot, it will detect and prefer HDMI and it works fine, and if HDMI is not plugged in, the LCD will come up as usual.

Problem is it only works with my TV... How do I make that work for example if I take it to a friends house?

@substring I already thought of that, so I set config.videomode to default.
Now, I'm still having trouble getting it to work. I'm a bit lost at this point.
I can't get it to pick HDMI over LCD if HDMI is connected

Alright!
Thanks for the info @Substring , I'll be doing some reading on these articles and as soon as I figure out a way to make this work with my config.txt I'll be posting the results here for future reference.

UPDATE 2:

I used display_default_lcd=0 on the config.txt
HDMI works fine on TV, no image on LCD screen. When rebooted without the HDMI cable plugged, still no image on LCD

UPDATE:

Just to confirm the HDMI is working, I added "ignore_lcd=1" to config.txt
Then I rebooted and as expected, I got image and sound from the TV, the RPi LCD is off now.

@substring said in [4.1.0 Unstable] Using 7TFT no HDMI image on TV (but I got sound):

tvserice -e "CEA 16 HDMI"

I haven't, but I will right now.
I just didn't know I had to use ""s and always got an error message, thanks for the tip.

So... I just did.
Turned off then on with CEA 16 HDMI
Just got sound, no image. The TV detects it as 16:9 1080/60p so it gets the signal right, only there's no image.

UPDATE:

Tried tvservice while the HDMI cable is plugged and it detects the TV, but just that.
It won't let me try -m or -M commands.

-s says this:

/recalbox/share_init/system$ tvservice -s
state 0x400000 [LCD], 800x480 @ 60.00Hz, progressive

-n says this:

/recalbox/share_init/system$ tvservice -n
device_name=GSM-LG_TV

-a says this:

/recalbox/share_init/system$ tvservice -a
PCM supported: Max channels: 2, Max samplerate: 192kHz, Max samplesize 24 bits.
AC3 supported: Max channels: 6, Max samplerate: 48kHz, Max rate 640 kb/s.

Hi everyone!
I'm using a RPi 3 with a 7'' TFT screen (this one: Element 14 7 Inches TFT Screen )

Screen works perfectly, has a terrific image quality, sound output is flawless through audio jack.

Problem is when I plug the HDMI cable I've been using before to the TV, when I turn the RPi on I just see a black screen on the TV, and the image comes from the 7'' TFT.
Only thing I get from the TV is sound.
What am I doing wrong?
Can I configure config.txt to "autodetect" when I plug HDMI and switch between HDMI and 7TFT? Or is there any script available for that?
Thanks a lot in advance.
Here's a copy of my current 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

NOOBS Auto-generated Settings:
#hdmi_force_hotplug=1
overscan_scale=0

max_usb_current=1
lcd_rotate=2
avoid_warnings=1
dtparam=audio=on

Hola a todos!
Estoy usando un Raspberry Pi 3 B con una pantalla táctil de 7 pulgadas ( link text

Esa misma del link.

La pantalla funciona de maravilla, tiene una calidad increíble, el sonido sale perfecto por el jack de audio.

El problema es cuando conecto un cable HDMI para usarla en una TV, al prender la Raspberry veo la imagen en la pantalla de 7'' pero el sonido sale por el HDMI de la TV, pero sin imagen en la TV.
Qué estaré haciendo mal???
Les dejo la copia de mi config.txt
Gracias de antemano!

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

NOOBS Auto-generated Settings:

#hdmi_force_hotplug=1
overscan_scale=0

max_usb_current=1
lcd_rotate=2
avoid_warnings=1
dtparam=audio=on

@substring Hi, sorry for the delay.
IT IS! I was on 4.0.2 and just wanted to do a reinstall due to my SD being corrupted, so I went on NOOBS, uinstalled Recalbox and installed again, but this time it installed 4.1!