Sadly, I think this is to be expected (if it is the tearing I mentioned above). This is due to the X windows system not being double buffered, so screen updates can happen during display updates, giving rise to tearing. We won't be spending the years of work required to make X double buffered. For serious video playback, use Kodi (in LibreElec) as that double buffers.Raks2003 wrote: ↑Fri Jul 19, 2019 1:53 pmFirstly, thank you for taking the time to write back - i appreciate it
I've had some slight success since last night - i decided to give LibreELEC a go, and it plays Youtube videos fine (using the add-on), and other videos from my USB stick - with NO annoying flicker.
The issue is still there with Raspbian though
OS - I'm currently using Raspbian (downloaded from NOOBS_v3_2_0). I had the same issue with my previous RPI4, when using NOOBS_v3_1_1.
PSU - using the official Power Supply for RPI4, from the PiHut website.
config.txt - I've made no changes to this.
Browser - I'm using Chrome, the default browser that came with Raspbian.
Windowed/Fullscreen mode - i get the same flickering issue regardless
Micro HDMI cable - I'm not sure where my original cable came from, but i bought one from Amazon recently https://www.amazon.co.uk/gp/product/B00 ... UTF8&psc=1
(if LibreELEC plays the videos correctly, then surely it isn't a HDMI cable issue?)
I will try to record a video this evening of the flicker issue.
Thank you very much!
Thank you very much for clarifying this Jamesh.Sadly, I think this is to be expected (if it is the tearing I mentioned above). This is due to the X windows system not being double buffered, so screen updates can happen during display updates, giving rise to tearing. We won't be spending the years of work required to make X double buffered. For serious video playback, use Kodi (in LibreElec) as that double buffers.
The problem is kodi in raspbian buster predates the Pi4, has no hardware decode support and triggers a bug in GL that causes tearing.
Nothing to do with 32 or 64bit I am afraid.
Greysvandir wrote: ↑Thu Jan 02, 2020 8:10 pmHi,
I tried to fix 'tearing' too. I was find a solution with another compositor. It is 'compton'. I am new in rpi 4 (it is my first rpi) and maybe it is not good solution, but for me it works.
What I've done:
Advanced setting / Compositor / Disabled
sudo apt install compton
to the '/etc/xdg/lxsession/LXDE-pi/autostart'
'@usr/bin/compton --backend glx'
xrandr --output HDMI-1 --mode 1280x720
Low resolution because in 1920x1080 some lags (not 'tearing'). Maybe it can be resolve with overclock.
https://tehnojam.ru/category/software/k ... linux.html
Hope this will help anyone
P.S. Sorry for my English
Code: Select all
pi@RPI4:~ $ sudo uname -a Linux RPI4 4.19.93-v7l+ #1290 SMP Fri Jan 10 16:45:11 GMT 2020 armv7l GNU/Linux
Code: Select all
cat /etc/os-release PRETTY_NAME="Raspbian GNU/Linux 10 (buster)" NAME="Raspbian GNU/Linux" VERSION_ID="10" VERSION="10 (buster)" VERSION_CODENAME=buster ID=raspbian ID_LIKE=debian HOME_URL="http://www.raspbian.org/" SUPPORT_URL="http://www.raspbian.org/RaspbianForums" BUG_REPORT_URL="http://www.raspbian.org/RaspbianBugs"
We did trial compton for a while before Pi4 launch, but IIRC it suffered from growing lag issues.