What does this thing do? It happens after I install a newer kernel, but it doesn't happen to another PC.
3min 9.523s plymouth-quit-wait.service
5.423s NetworkManager-wait-online.service
2.930s dev-sda1.device
2.091s snapd.service
1.612s dev-loop10.device
1.602s dev-loop11.device
1.581s dev-loop8.device
1.574s dev-loop12.device
1.534s dev-loop9.device
1.299s dev-loop1.device
1.263s dev-loop2.device
1.239s dev-loop0.device
1.232s dev-loop3.device
1.218s dev-loop5.device
1.191s udisks2.service
1.179s dev-loop6.device
1.175s dev-loop4.device
1.159s dev-loop7.device
1.099s ModemManager.service
1.067s networkd-dispatcher.service
948ms accounts-daemon.service
888ms gdm.service
857ms systemd-logind.service
815ms avahi-daemon.service
810ms thermald.service
799ms loadcpufreq.service
795ms gpu-manager.service
772ms wpa_supplicant.service
772ms NetworkManager.service
It's a bug in Ubuntu, I need to install
haveged
orrng-tools
to fix it.