Comment 17 for bug 1867900

Here are quick steps to reproduce.

1) Install ubuntu 18.04
2) sudo apt-add-repository -y ppa:hardware-certification/public
3) sudo apt install -y canonical-certification-server
4) Download and install focal kernel debs and reboot
   - https://launchpad.net/ubuntu/+archive/primary/+files/linux-headers-5.4.0-21-generic_5.4.0-21.25_arm64.deb
   - https://launchpad.net/ubuntu/+archive/primary/+files/linux-headers-5.4.0-21_5.4.0-21.25_all.deb
   - https://launchpad.net/ubuntu/+archive/primary/+files/linux-image-unsigned-5.4.0-21-generic_5.4.0-21.25_arm64.deb
   - https://launchpad.net/ubuntu/+archive/primary/+files/linux-modules-5.4.0-21-generic_5.4.0-21.25_arm64.deb
   - https://launchpad.net/ubuntu/+archive/primary/+files/linux-modules-extra-5.4.0-21-generic_5.4.0-21.25_arm64.deb
5) `sudo stress-ng --aggressive --verify --timeout 330 --metrics-brief --tz --times --af-alg 0`