Strange graphics issues such as flickering application windows and inconsistent display lagging

My computer was acting really strange; the windows were flickering and parts of windows of different applications were partly appearing at random places. Also when I was typing, my computer seemed to automatically selected text and copied it, but it could also be that it just duplicated a part of the screen of a few seconds ago. Hard to describe, but unworkable.

My Thinkpad carbon passed all hardware tests and I installed a fresh Ubuntu install. Still the same behavior. I found a solution that I wanted to share.

Here is Solutions:

We have many solutions to this problem, But we recommend you to use the first solution because it is tested & true solution that will 100% work for you.

Solution 1

The -49 and -50 kernels are flawed, and have been withdrawn. There are graphics issues (possibly only with internal Intel video subsystems).

Boot your computer. At the GRUB menu, select the 2nd choice, Advanced Options (or some such), and select your -48 kernel, or earlier if you don’t have -48, and run off of that for now.

Keep up to date with Software Updater and once you see the -51 kernel, or later, then choose it at next boot.

Update #1:

Start Synaptic and install these files (search for 5.8.0-48)…

Strange graphics issues such as flickering application windows and inconsistent display lagging

Run:

ls -al /boot

Confirm that initrd.img-5.8.0-48-generic is there.

If it’s not there, then run:

sudo update-initramfs -c -k 5.8.0-48-generic

Then:

sudo update-grub
reboot

At the GRUB menu, select Advanced Options, then select the -48 kernel to boot from.

Solution 2

EDIT: THIS SOLUTION DOES NOT WORK, ONLY TEMPORARY

However I found a very simple solution that I didn’t find here so I want to share it. I needed to reconfigure my window manager. It are the first two steps of this link

1.) Check the current running display manager by running command:
systemctl status display-manager.service
Strange graphics issues such as flickering application windows and inconsistent display lagging

  1. Run command to reconfigure the default manager:
    sudo dpkg-reconfigure gdm3

Where you replace gdm3 with the manager you have at Main PID:

Note: Use and implement solution 1 because this method fully tested our system.
Thank you 🙂

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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