Score:1

Two monitors, one in portrait mode (vertical), intel UHD 630, screen artifacts / tears

in flag

Problem description

I have two monitors with Ubuntu 20.04:

  • Primary DELL 24" in landscape mode connected as DP-1
  • Secondary BENQ 24" in portrait mode connected as HDMI-1, however it is in fact DVI-D - HDMI connection. Also for some reason Ubuntu display manager in GUI views it like BENQ 22" which is wrong.

So I have screen tearing problem, especially in the browsers while scrolling. On the vertical monitor I have vertical tearing while scrolling and on landscape monitor I have somewhat diagonal tearing while scrolling.

What I've tried to do:

I've tried to create /etc/X11/xorg.conf.d/ directory and put this in 20-intel.conf:

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

After reboot I had my vertical monitor turn back to horizontal and Chrome and Firefox did not render their pages properly. Every click inside their windows seemingly lead to nothing, but if maximized/minimized the rendering was correct. After I tried to make it vertical back in Ubuntu display manager GUI, xorg (? I'm not sure, I'm a noob) crashed.

If I do this without "DRI" "3" option then after reboot both monitors have some ugly artifacts.

ChanganAuto avatar
us flag
Try in Wayland instead.
Boris Kalinin avatar
in flag
@ChanganAuto, can you please be more specific? I've just discovered what Wayland is and I see that in my `/etc/gdm3/custom.conf` there is a line `#WaylandEnable=false` which should basically mean that it is enabled, right? What should I do now?
ChanganAuto avatar
us flag
It means the exact opposite actually. It means Xorg. Reboot or logoff then choose Wayland, can't be more specific than that. The picture here shows the option: https://fossbytes.com/why-components-of-login-screen-in-ubuntu-20-04-looks-so-misaligned/
Boris Kalinin avatar
in flag
@ChanganAuto, thank you very much! Did not do anything except logging off and logging in with Wayland and the problem seems gone.
ChanganAuto avatar
us flag
That's why Wayland is the default in 21.04 and from now on.
Paul Jurczak avatar
pe flag
I have the same issue with Ubuntu Mate 20.04. Surprisingly, after adding `20-intel.conf` the tearing was gone, but so was the audio output. I'm looking for alternatives.
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