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I've installed KDE on lubuntu 19.04 and i have weird glitches "things appear and disappear randomly" this is a video showing that glitch https://youtu.be/hzWpQg9foRY

what I've tried: changing rendering backend to every single option possible but nothing helped and the same for vsync About System Window

Versions: KDE plasma 5.16 Ubuntu: 19.04

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this fixed my problem https://bbs.archlinux.org/viewtopic.php?pid=1595276#p1595276

and this is what i did first i created this file

sudo vim /etc/X11/xorg.conf.d/20-intel.conf

then added this in it

Section "Device"
Identifier  "Intel Graphics"
Driver      "intel"
#Option      "AccelMethod"  "sna"
Option      "TearFree"    "true" 
Option      "DRI"    "3" 
EndSection

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