Flickering and a lack of smoothness are two different issues. The lack
of smoothness would just be due to your GPU staying at a lower frequency
more often, so it's not a bug but something you would need to tune
yourself.

As for the flickering, please edit /etc/default/grub and change:

  GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

to:

  GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.enable_psr=0"

and then run:

  sudo update-grub

and reboot.

If the problem still happens after that then while it is happening,
please run:

  journalctl -b0 > journal.txt

and attach the resulting text file here along with a video of the
flickering problem.

** Summary changed:

- screen flickring after installing cpufreq
+ [HP EliteBook 820 G2] screen flickring after installing cpufreq

** Package changed: xorg (Ubuntu) => linux-hwe-5.11 (Ubuntu)

** Changed in: linux-hwe-5.11 (Ubuntu)
       Status: New => Incomplete

-- 
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1945895

Title:
  [HP EliteBook 820 G2] screen flickring after installing cpufreq

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-hwe-5.11/+bug/1945895/+subscriptions


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