Thinkpad T480, screen flicker fix

Linux Mint 22.1 on the T480 causes screen flickering.

To replicate:

  • check the login screen once the laptop has come out of suspend
  • or open a dock applet
  • hold the mouse on on a dropdown for a long time.

Issue seems to be related to transparency and screen sleep, in X11.

Fix

mesa-utils

Check that mesa-utils package is installed

apt list | grep "mesa-utils"

Install the package if not present

X11 config

Open the X11 config directory

cd /etc/X11/xorg.conf.d

Create the 20-intel.conf within the above directory, with the following contents

Section "Device"
 Identifier "Intel Graphics"
 Driver "Intel"
 Option "AccelMethod" "sna"
 Option "TearFree" "true"
EndSection

Reboot

You can also fix it by installing KDE Plasma :P /s