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 Bugs, which is subscribed to 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 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs