After spending more than 4 hours looking for a possible solution, I might know what could cause this issue.
I think the problem is related to the GPU video driver that for what I saw, they are not working and/or not installed by default by Ubuntu.
This is the only difference between my Odroid XU4 and the Rock64 (I have used the same configuration files).
Anyhow, I have tested the GPU acceleration on my Rock64 with https://webglsamples.org/aquarium/aquarium.html and I get 1 fps with 1 fish.
In addition to this, I also noticed that if I select any Marco with GPU compositor, my desktop turn all black and only the mouse cursor is visible (same behavior as x11vnc). That's why, I do not think this is a coincidence. Of course, I may be wrong...
At this point I have a question... Is not Ubuntu suppose to install the driver for the ARM Mali-450MP2 automatically?
I just tried out DietPi and X11vnc works wonderfully. Also, the GPU acceleration works much better. I have much more frame/sec with glxgears especially in full screen mode. Also, when I set the Marco GPU compositor, it works. (very slow though)
I think the problem is related to the GPU video driver that for what I saw, they are not working and/or not installed by default by Ubuntu.
This is the only difference between my Odroid XU4 and the Rock64 (I have used the same configuration files).
Anyhow, I have tested the GPU acceleration on my Rock64 with https://webglsamples.org/aquarium/aquarium.html and I get 1 fps with 1 fish.
In addition to this, I also noticed that if I select any Marco with GPU compositor, my desktop turn all black and only the mouse cursor is visible (same behavior as x11vnc). That's why, I do not think this is a coincidence. Of course, I may be wrong...
At this point I have a question... Is not Ubuntu suppose to install the driver for the ARM Mali-450MP2 automatically?
I just tried out DietPi and X11vnc works wonderfully. Also, the GPU acceleration works much better. I have much more frame/sec with glxgears especially in full screen mode. Also, when I set the Marco GPU compositor, it works. (very slow though)