HDMI flickering

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robabruton
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HDMI flickering

Unread post by robabruton » Tue Apr 16, 2019 6:48 pm

Hello,
I received my N2 yesterday and was excited to get it up and running. I'm using an SD card for testing currently (running the MATE desktop Ubuntu image provided on the wiki). I was planning to use this device as a media box eventually, but as of now when it's connected to my TV via HDMI my screen flickers every couple seconds. The device also seems a little unresponsive on the desktop but maybe I was expecting more for this small device. I'm sure Kodi will run fine once it's available for this platform. My issue is that this screen flickering is not going to be okay for use. Is this something that's temporary while the GPU drivers are being developed further or is this something more serious? Could I have done something wrong?

I'm using a quality HDMI cable. I'm running the TV at 4k60. The TV is a common (not obscure model) Samsung LED TV.

Here's a link to a short clip of my flickering issue: https://youtu.be/uYGYw-tFUGE

I'm new to ODROID but excited to learn more. Open to any suggestions or help. Thanks!

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venkatbo
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Re: HDMI flickering

Unread post by venkatbo » Tue Apr 16, 2019 10:34 pm

I noticed the same issue on my 4k monitor, while the same works fine with multiple C2's, H2 and Macbook Pro.

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Gburas
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Re: HDMI flickering

Unread post by Gburas » Wed Apr 17, 2019 5:50 am

also have this flickering on a samsung 4k hdr tv

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odroid
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Re: HDMI flickering

Unread post by odroid » Wed Apr 17, 2019 9:40 am

To narrow down root causes, can you please try other 4K modes after disabling "display_autodetect" option?
https://github.com/mdrjr/n2_bootini/blo ... ni#L24-L31

robabruton
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Re: HDMI flickering

Unread post by robabruton » Wed Apr 17, 2019 9:56 am

I've tried 4k60 with autodetect disabled and still get this issue (the recording was with autodetect off). I haven't tried any other modes. I'll give them a go and will report back. It may take me a day or so before I get the time to do this though.

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Re: HDMI flickering

Unread post by crashoverride » Wed Apr 17, 2019 4:07 pm

I am sure I have seen this issue before, but I can't find it searching the forum.

Try disabling the X11 compositor:
Control Center / Mate Tweaks / Windows / Window Manager = Marco (No Compositor)
Control Center / Windows / General / Enable Software Compositing Window Manger = No

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Re: HDMI flickering

Unread post by Raybuntu » Thu Apr 18, 2019 12:46 am

Edit: nevermind

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poincare
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Re: HDMI flickering

Unread post by poincare » Fri Apr 19, 2019 9:43 am

I also get this tearing issue. It appears to happen about every 2-3 minutes. Whether there is mouse movement of if the interface/screen is just idle. I can't seem to get it TO happen; but, I can't seem to prevent it from happening. I am also using a 4K monitor.

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