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TinkerOS Screen Flickering
#1
Hello,

I tired to solve this problem myself in the past weeks, but I have to give up. I hope anyone can help me.


I recently bought a Tinker board with TinkerOS Android to connect it to my TV and run Kodi on it. specs below.

But sadly, I have sever problems getting a stable picture. This happens in the android screen as well as in Kodi. I also tried running the Ubuntu distro, but I cannot get a stable WiFi connection under it.


The screen might flicker at random. Sometimes about every 1-2 second, sometimes 2-3 days pass without flickering. When it flickers the sound also pauses. Sometimes the screen also turns pink for a minute or so before changing back to normal colour. Before it flickers I often see horizontal lines run in the display, but they are not always present.

I can sometimes solve the problem by sereral connect/disconnect cycles of the HDMI cable. When I connect my Laptop to the TV everythink works fine. Sadly I have no other display to test the tinkerboard against.



From what I've read this could be a resolution problem of the Tinkerboard / OS with the TV.

I tried setting different screen resolutions (mainly via adb because actually using the system is a pain), but had no success. When I set the resolution to "auto" I get no picture at all.

The TV runs a resolution of 1366x768 pixel.

When I check via adb i get:


Code:
adb shell wm size
Physical size: 1920x1080
Override size: 1366x768

density:
Override density: 72
Physical density: 240

From what I understand the density of my screen 48.97 PPI (https://www.sven.de/dpi/), but I cannot set it lower than 72.



Does anyone have a suggestion on how to improve it?



Thanks in advance

-----------------------------------------------------
specs:


--------------
Tinker Board s
https://www.amazon.de/gp/product/B07CTHT...UTF8&psc=1

--------------
OS:
I checked for the OS with 

Code:
adb shell cat /proc/version

and got

Code:
Linux version 3.10.0 (jenkins@fdc-06) (gcc version 4.6.x-google 20120106 (prerelease) (GCC) ) #1 SMP PREEMPT Thu Jul 12 17:13:37 CST 2018

--------------
TV: Telefunken T32HD906S
http://www.hifi-forum.de/themen/produkte.../t32hd906s

Display
  • Size in inch: 32
  • Height in Pixel: 768
  • width in Pixel: 1366
  • Refreshrate in Hz: 50
Reply
#2
What about if you try a different monitor or TVset ?
You should find what is the preferred setting for your TVset. I can't help you much, I prefer to dodge Android Tongue
Perhaps you might look what xrandr says
Code:
$ xrandr -v
Light blue words might be a link. Have you try to click on them? Big Grin
Reply
#3
I face Screen Flickering issue with SOME videos.
I always suggested it is a low power issue, or the movie is too heavy on the TB to decode.
why low power?! cuz I use usb external hard drive that has no independent power supply, and this issue happens only with heavy videos,
and I get low voltage message.

anyway, I will try to do a test to make sure.
Reply
#4
I have this behavior when the power source is weak and can't stand the power requirements.

Worth checking.
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