After upgrade from Ubuntu 16 to 18.04, systemd-udevd uses 100% CPU

Since I upgraded from Ubuntu 16 to 18.04, CPU usage is high. Sometimes 100% cpu usage, and when that happens we can't do anything. If we check on the process systemd-udevd, we find it is using 100% CPU. I have followed an answer to this question: Ubuntu 18.04 systemd-udevd uses high CPU, conflict with nvidia graphics but now I can't use any browser.

I ran the command sudo mv /lib/udev/rules.d/71-nvidia.rules ~ and now I can't install a new browser or use the old one, and I still have this 100% CPU issue.

Here's a detailed list of my system hardware

Note: I have installed Mint 19 version and found the same issue. I just downgraded to Mint 18.3 and CPU and memory usage are fine. Many others also reported the same issue.

I also faced the same issue after upgrade on my DELL laptop.

My workaround

Soon after booting, stopping and starting systed-udev eliminates all bind and unbind problems and response drastically improves. I used the following two commands in sequence:

sudo systemctl stop systemd-udevd systemd-udevd-kernel.socket systemd-udevd-control.socket
sudo systemctl start systemd-udevd systemd-udevd-kernel.socket systemd-udevd-control.socket

My understanding

Before all hardware is discovered properly, bind/unbind starts executing when no procedures are available and does not get reinitialized. After stopping and starting, it gets all the procedures in place. Probably, this is a boot sequence problem.

laptop Dell vostro 3300

:~$ cat /etc/lsb-release 
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=18.10
DISTRIB_CODENAME=cosmic
DISTRIB_DESCRIPTION="Ubuntu 18.10"

:~$ lscpu
Architecture:        x86_64
CPU op-mode(s):      32-bit, 64-bit
Byte Order:          Little Endian
CPU(s):              4
On-line CPU(s) list: 0-3
Thread(s) per core:  2
Core(s) per socket:  2
Socket(s):           1
NUMA node(s):        1
Vendor ID:           GenuineIntel
CPU family:          6
Model:               37
Model name:          Intel(R) Core(TM) i5 CPU       M 430  @ 2.27GHz
Stepping:            2
CPU MHz:             1570.403
CPU max MHz:         2262,0000
CPU min MHz:         1197,0000
BogoMIPS:            4521.91
Virtualization:      VT-x
L1d cache:           32K
L1i cache:           32K
L2 cache:            256K
L3 cache:            3072K
NUMA node0 CPU(s):   0-3

create file in /etc/init.d/

sudo nano /etc/init.d/systemd-udevd-solv.sh

paste -->

#!/bin/sh
case "$1" in
  start)
    sleep 5
    systemctl stop systemd-udevd systemd-udevd-kernel.socket systemd-udevd-control.socket
    sleep 5
    systemctl start systemd-udevd systemd-udevd-kernel.socket systemd-udevd-control.socket
esac

ctrl + x to save file and confirm exit

change permission

sudo chmod a+x /etc/init.d/systemd-udevd-solv.sh

enable script to run at startup

cd /etc/rc3.d
ln -s ../init.d/systemd-udevd-solv.sh S06systemd-udevd-solv