Radxa zero 3 display no signal

Troubleshooting
1

Creating a bug report/issue

I have searched the existing open and closed issues

Required Information

  • DietPi version | 9.10.0
  • Distro version | bookworm
  • Kernel version | Linux smart-mirror 5.10.160-legacy-rk35xx #1 SMP Wed Jul 10 09:57:26 UTC 2024 aarch64 GNU/Linux
  • Architecture | arm64
  • SBC model | Radxa ZERO 3 (aarch64)
  • Power supply used | 5V 1A
  • SD card used | SanDisk

Steps to reproduce

  1. plug hdmi in
  2. plug power in
  3. boot up
  4. startx

Expected behaviour

Monitor displays x session

Actual behaviour

Monitor displays no signal screen

Extra details

I got the problem that my older hdmi monitor (see controller board) displays “no signal”. A newer monitor displays without issues. The older monitor e.g. with raspberry pi zero displays without issues. So it seems that the combination older monitor and radxa zero 3 with dietpi has a problem.

I did some experimenting with xrandr without luck. Everything seems to work but get no signal at all. It says HDMI-1 is connected and supports resolutions like 1280x720@50/60. I also tried 720x480 without luck.

Help please :cry: I got out of ideas

Thanks in advance
Julian

2

did you solve?

3

I had similar issues with my Zero 3E.
Using a short Micro-HDMI->HDMI cable did not work at first.
The monitor had several inputs, also one VGA. I then used a HDMI->VGA converter and all worked fine. When I then switched back to the HDMI input of the monitor, all worked fine from this on.
See also No HDMI sound on Radxa Zero 3w · Issue #7520 · MichaIng/DietPi · GitHub