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I have never used a raspberry before, and I am having trouble configuring it. I've been searching for an answer to my problem but I have had no success in finding it. Maybe the answer is there but I have not been able to understand it, which is possible.

I have a Raspberry Pi 3 that outputs on a very tall LED wall. It's supposed to show some dynamic content working under HTML5. The code works correctly, as I have tested it on a regular screen with success.

The problem comes when I connect the raspberry to the LED wall. It has a very specific resolution (192 px wide, for 1216 px tall)

Tampering with the configuration, I have set the resolution to the highest I can find, but I'm a few pixels shy of 1216, and with LEDs that big it's very noticeable.

As far as I have found, there is only a limited list of resolutions to choose from. Is there any way to set a manual resolution to 192x1216? Or at least a bigger resolution that my screen fits in?

Thanks.

Helwar
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2 Answers2

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Since 1216 pixels in height is a little unconventional, I would suggest rotating the screen 90 degrees and setting the resolution to 1216x192 instead.

Add these 2 lines to /boot/config.txt and comment out any other occurrences of them if they already exists. You can edit the file by writing sudo nano /boot/config.txt

display_rotate=1 # Rotate the screen 90 degrees
hdmi_cvt 1216 192 60 # Set the resolution to 1216x192

And then reboot the unit with sudo reboot

In case the custom resolution doesn't work you could try to work with rotating the screen with the first line and use 1280x720 pixels instead.

Johan
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  • I can't test it now, and won't be able to test it in a few days, past the bounty end-date. Your answer seems promising though, that's why I will reward you the bounty, and I will comment back and accept it as the answer when I'm able to really test it . Thanks – Helwar Sep 24 '18 at 16:28
  • Cheers, please do come back if it doesn't work so I can see if there's any other solution that could work out. – Johan Sep 24 '18 at 16:33
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    It did work. It took a bit of work as it wasn't just applying this and fire, but it worked. I had to set it to 1280x720 since it didn't accept my super-narrow resolution. Sorry for the late response, I'm still struggling with the project for other reasons that's why it took so long. – Helwar Oct 22 '18 at 06:14
  • I'm glad to hear it. I thought it could be a problem with the width of 192px, but I guessed as long as you could fit the height, it would be possible to work around it. – Johan Oct 22 '18 at 11:32
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This particular combination of parameters for /boot/config.txt was the one that worked for me:

disable_overscan = 1
hdmi_group = 2
hdmi_mode = 87
hdmi_cvt = 1024 600 60 6 0 0 0
display_hdmi_rotate = 3
tgarcia
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