How to solve the Ubuntu 18.04 display issues (lagging, flickering)?

Solution 1:

Assuming the nVidia is causing the issue, a workaround is to run on the Intel IGD exclusively. The following steps achieve this in increasing order of 'exclusivity'. You could check for improvement after each step.

1. Configure Xorg to prefer the Intel

Create file /etc/X11/xorg.conf.d/10-intel.conf (this may require mkdir /etc/X11/xorg.conf.d), containing:

Section "OutputClass"
   Identifier "Intel"
   MatchDriver "i915"
   Driver "intel"
EndSection

2. Disable modeswitching out of IGD

Edit /etc/default/grub and add xdg.force_integrated=1 to GRUB_CMDLINE_LINUX. When done, run sudo update-grub before rebooting.

3. Blacklist the nouveau kernel driver

Edit /etc/default/grub and add modprobe.blacklist=nouveau to GRUB_CMDLINE_LINUX. When done, run sudo update-grub before rebooting.

4. Uninstall the Xorg nouveau driver

sudo apt remove xserver-xorg-video-nouveau

This will trigger removal of the xserver-xorg-video-all meta-package, which by default is installed. That is alright, as long as xserver-xorg-video-intel remains installed. To be sure:

sudo apt remove xserver-xorg-video-all
sudo apt install xserver-xorg-video-intel

How to solve the Ubuntu 18.04 display issues (lagging, flickering)?

Solution 1:

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