[4.1.0 Unstable] Using 7TFT no HDMI image on TV (but I got sound)

[Defiant]

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]

@defiant I'm stuck at the same step ... It only works in very few cases (i.e. known TVs). I couldn't find any way to make it generic

[Defiant]

@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

[Substring]

@defiant indeed but there is no generic hdmi filter, unless we can put a * in the section name ... That's somethinh we should ask on the official pi forum

[Defiant]

@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!

[Substring]

@defiant Yeah sure : https://www.raspberrypi.org/forums/

[Substring]

While searching, I wonder if these may be of interest :
https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=193430

[Defiant]

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

[Substring]

@defiant You need to dig in the rasp forum ...

[Defiant]

@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

[Substring]

@defiant mmmhhhh after reading https://www.raspberrypi.org/forums/viewtopic.php?f=44&t=143286 it seems indeed much more complicated than expected as there is some configuration prepared depending on the screen plugged at boot (regarding the framebuffer definition, as I seem to understand) which makes it nearly impossible to swith it post boot.

I remember that switching to HDMI once booted on the DPI failed. Maybe i should give a try to vcgen commands to first disable the DPI and then switch to HDMI, who knows ... The only solution for now seems indeed to use PINN (which seems to be possible). I sadly don't have much time for now to tinker with this

[Substring]

The only solution I found is https://www.raspberrypi.org/forums/viewtopic.php?f=108&t=150889 which is the same as your post on the PINN readme

[Defiant]

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]

@defiant great ! I thought about asking the PINN author what it would take to add Recalbox support ... If your tests are successful, you may just make me do the final step to get in touch with him

[Defiant]

@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.

[Substring]

@defiant Recalbox won't boot through pinn ?

[Defiant]

@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]

@defiant ah well ... never used PINN, no time available to test

[Defiant]

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