Please Help configurate my 800x800 px round screen (blank screen)

Hi guys, Im an absolutly noob with raspberry pi and emteria. My circular Display shows me a black screen when I run Emteria OS for the first time.

with the following settings in rasbian os it works great but on Emteria which I purchased a few hours ago, it shows me only a black screen...

force_trubo=1
gpu_freq=300
core_freq=400

HDMI Basic configuration

hdmi_pixel_freq_limit=400000000
hdmi_timings=800 0 40 12 40 800 0 12 12 12 0 0 0 60 0 44740000 0
hdmi_drive=2
disable_overscan=1
max_framebuffer_width=2560
max_framebuffer_height=2560

Portrait or Landscape Setting

Portrait-1 Flexible cable is bottom side.)

display_rotate=0
framebuffer_width=800
framebuffer_height=800

For more options and information see

http://www.raspberrypi.org/documentation/configuration/config-txt.md

Some settings may impact device functionality. See link above for details

uncomment if you get no picture on HDMI for a default "safe" mode

hdmi_safe=1

uncomment this if your display has a black border of unused pixels visible

and your display can output without overscan

disable_overscan=1

uncomment the following to adjust overscan. Use positive numbers if console

goes off screen, and negative if there is too much border

overscan_left=16

overscan_right=16

overscan_top=16

overscan_bottom=16

uncomment to force a console size. By default it will be display's size minus

overscan.

framebuffer_width=1280

framebuffer_height=720

uncomment if hdmi display is not detected and composite is being output

hdmi_force_hotplug=1

uncomment to force a specific HDMI mode (this will force VGA)

hdmi_group=1

hdmi_mode=1

uncomment to force a HDMI mode rather than DVI. This can make audio work in

DMT (computer monitor) modes

hdmi_drive=2

uncomment to increase signal to HDMI, if you have interference, blanking, or

no display

config_hdmi_boost=4

uncomment for composite PAL

sdtv_mode=2

uncomment to overclock the arm. 700 MHz is the default.

arm_freq=800

Uncomment some or all of these to enable the optional hardware interfaces

dtparam=i2c_arm=on

dtparam=i2s=on

dtparam=spi=on

Uncomment this to enable the lirc-rpi module

dtoverlay=lirc-rpi

Additional overlays and parameters are documented /boot/overlays/README

Enable audio (loads snd_bcm2835)

dtparam=audio=off

Please, can someone explain me what I do wrong?

Comments

  • Don't know if this would work for you (and there are no guarantees) but have you tried this?

    Changing the line:
    dtoverlay=vc4-kms-v3d,cma-256
    to
    dtoverlay=vc4-fkms-v3d,cma-256

    That was the only line in the config I needed to change to make it display on my TV.

  • Hi, thanks for your answer. It was allready changed when I looked into config.txt. Dont know why but it doesnt work for me.
    Anyway thanks for your help

  • edited August 17

    You could try change it the other way around and see if that works. If not, must be something else.

  • Ok I will try it tomorrow and write back :)

  • Well, any news? Did you fix the problem or still the same? Sorry I couldn't be more help.

  • I have another question. What resolution and refresh rate were you using? And are you using DVI or HDMI?

    hdmi_cvt=1920 1080 60 6 0 0 0

    Above is the setting for 1920x1080 (1080p) 60Hz refresh rate.

  • Hi I found out that my mipi to hdmi board was broken. xD its working now, But I cant finish my project with the raspberry pi 3. Its to weak. 4 is out now but no support for android. I switched to rock pi 4b and its a rocket, not a rock 😁

  • edited August 30

    Nice! Might have to get one of those Rock Pi 4b boards. But I have an Odroid XU4 and it's pretty powerful. Also supports Android (that you can get for free). Such a cool little board. I love it. Only downside is you have to buy the wifi and bluetooth dongles separate.

  • @Cee123 yeah I wanted to buy it at first but then decided for the rockpi because here its included(b-version) problem is comunity is way smaller then the one from odroid. If you need help by setting up something, you have to wait a lot and ask everybody you see xD

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