4K Resolution Issues

anlumo

Hello,

I'm running Ubuntu 18.04 on the AIO-3399J with a 4k screen (HDMI 2.0), and I'm having problems with the display. Everything flickers, the display turns off and back on again every few seconds, I sometimes get green dots in a regular pattern and video playback has a lot of artifacts (parts of the video shown in the wrong location etc).

Everything works fine at lower resolutions. Is there a way to fix this? I think I also had the same artifacts with the preinstalled Android 7.1.

penguin

Hi anlumo,
Does the 4K display work correctly with other boards or PC ?

penguin

@anlumo,

If you open the "Screen Setting" application, are there any 4k resolutions listed?

I tried with the 4K LeTV display. No 4k resolution listed there.

anlumo

The higher resolutions are listed. The screen works fine on other machines with HDMI 2.0.

penguin

Which Android firmware do you use?
Better post a video about this, and also the kernel log and android logcat,which help to solve the problem.

christa797

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