No HDMI <-> no VNC

Kodi Add-ons
1

Hi Everyone

I use my CoreElec box as a microcomputer, thus it mostly has no display connected. It has the following cycle:

  • reboot with display connected → aml-vnc works
  • disconnect display → aml-vnc still works (Idle CPU temp is 5 celsius higher as usual. Possibly even with display connected…)
  • reboot with no display → no VNC
  • connect display → nah, reboot is needed.

No VNC means I can actually connect, but see only blank screen, no keyboard input wakes it up. May be the black screensaver. Anyway, display remains black.
I suspect it didn’t work like this after fresh reinstall, but I cant prove it. Maybe after the next reinstall.

My questions are:

  • how can I keep VNC possible? Can I trick CoreElec to think has a display connected?
  • how can I find the reason of high CPU / high CPU temperature? What inputs shall I provide here for help? Debug logs? Backup?

Thanks in advance

2

Use board search, there are already some issues and how to solve it to be find in forum.

3

With my S905X3 and S912 devices I have no problem, VNC always works fine regardless of the state of the TV (off or on at CE boot).

My configuration of /storage/.config/autostart.sh is like this:

#!/bin/sh
(
sleep 20s
...
# use this in case of problems:
# fw_setenv hdmimode 1080i50hz
# fw_setenv outputmode 1080i50hz
# echo 1080i50hz > /storage/.kodi/userdata/disp_cap
...
# vnc will stand up himself
pkill -f aml-vnc
)&

When CE/LE is disconnected from the TV the CPU temperature is lower, this is normal, I suppose the drivers detect this and the screen refresh processes stop working temporarily.

4

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