Xorg high CPU usage after installing nvidia drivers

Hello,

I recently installed the NVIDIA drivers following the instructions on this link in order to setup TensorFlow for deep learning.

Ever since then, Xorg and system-journald started consuming CPU excessively. I ran the following commands in hopes of troubleshooting the issue:

thanos@ubuntu-thanos:~$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 18.04.2 LTS
Release:	18.04
Codename:	bionic
top - 15:18:49 up 41 min,  1 user,  load average: 2.97, 3.29, 3.26
Tasks: 295 total,   3 running, 246 sleeping,   0 stopped,   0 zombie
%Cpu(s): 20.0 us, 50.9 sy,  0.0 ni, 29.0 id,  0.1 wa,  0.0 hi,  0.0 si,  0.0 st
KiB Mem :  8079992 total,   123892 free,  2329232 used,  5626868 buff/cache
KiB Swap:  8299516 total,  8299516 free,        0 used.  5399288 avail Mem 

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND                                                                                                                   
 1181 root      20   0  354284  73548  44436 R 127.2  0.9  49:31.12 Xorg                                                                                                                      
  286 root      19  -1  345032 132712 131564 R  97.3  1.6  37:02.84 systemd-journal                                                                                                           
  962 syslog    20   0  263036   4120   3544 S  48.8  0.1  18:49.22 rsyslogd                                                                                                                  
  ...
thanos@ubuntu-thanos:~$ nvidia-smi
Sun Mar 24 15:20:09 2019       
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 418.39       Driver Version: 418.39       CUDA Version: 10.1     |
|-------------------------------+----------------------+----------------------+
| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
|===============================+======================+======================|
|   0  GeForce GTX 950M    On   | 00000000:09:00.0 Off |                  N/A |
| N/A   71C    P8    N/A /  N/A |    387MiB /  4046MiB |      0%      Default |
+-------------------------------+----------------------+----------------------+
                                                                               
+-----------------------------------------------------------------------------+
| Processes:                                                       GPU Memory |
|  GPU       PID   Type   Process name                             Usage      |
|=============================================================================|
|    0      1181      G   /usr/lib/xorg/Xorg                            42MiB |
|    0      1229      G   /usr/bin/gnome-shell                          65MiB |
|    0      1494      G   /usr/lib/xorg/Xorg                           115MiB |
|    0      1695      G   /usr/bin/gnome-shell                         119MiB |
|    0      2455      G   ...uest-channel-token=11843812546895049575    40MiB |
+-----------------------------------------------------------------------------+

Edit: Adding some additional output.

thanos@ubuntu-thanos:~$ ubuntu-drivers devices
== /sys/devices/pci0000:00/0000:00:1c.4/0000:09:00.0 ==
modalias : pci:v000010DEd0000139Asv00001179sd0000F842bc03sc02i00
vendor   : NVIDIA Corporation
model    : GM107M [GeForce GTX 950M]
driver   : nvidia-driver-390 - distro non-free
driver   : nvidia-driver-410 - third-party free
driver   : nvidia-driver-418 - third-party free recommended
driver   : xserver-xorg-video-nouveau - distro free builtin

Edit: /var/log/Xorg.0.log is being spammed with this message:

[(EE) ETPS/2 Elantech Touchpad: Read error 9

Full stack trace:

[    18.734] (II) config/udev: Adding input device ETPS/2 Elantech Touchpad (/dev/input/mouse0)
[    18.734] (**) ETPS/2 Elantech Touchpad: Ignoring device from InputClass "touchpad ignore duplicates"
[    18.735] (II) config/udev: Adding input device Toshiba input device (/dev/input/event6)
[    18.735] (**) Toshiba input device: Applying InputClass "evdev keyboard catchall"
[    18.735] (**) Toshiba input device: Applying InputClass "libinput keyboard catchall"
[    18.735] (II) Using input driver 'libinput' for 'Toshiba input device'
[    18.736] (II) systemd-logind: got fd for /dev/input/event6 13:70 fd 54 paused 0
[    18.736] (**) Toshiba input device: always reports core events
[    18.736] (**) Option "Device" "/dev/input/event6"
[    18.736] (**) Option "_source" "server/udev"
[    18.736] (II) event6  - Toshiba input device: is tagged by udev as: Keyboard
[    18.736] (II) event6  - Toshiba input device: device is a keyboard
[    18.736] (II) event6  - Toshiba input device: device removed
[    18.736] (**) Option "config_info" "udev:/sys/devices/virtual/input/input13/event6"
[    18.736] (II) XINPUT: Adding extended input device "Toshiba input device" (type: KEYBOARD, id 14)
[    18.736] (**) Option "xkb_model" "pc105"
[    18.736] (**) Option "xkb_layout" "us"
[    18.737] (II) event6  - Toshiba input device: is tagged by udev as: Keyboard
[    18.737] (II) event6  - Toshiba input device: device is a keyboard
[    19.637] randr: falling back to unsynchronized pixmap sharing
[    25.920] (EE) BUG: triggered 'if (priv->num_active_touches == 0)'
[    25.921] (EE) BUG: ../../src/synaptics.c:2958 in UpdateTouchState()
[    25.921] (EE) 
[    25.921] (EE) Backtrace:
[    25.921] (EE) 0: /usr/lib/xorg/Xorg (xorg_backtrace+0x4d) [0x5635c31fb8cd]
[    25.921] (EE) 1: /usr/lib/xorg/modules/input/synaptics_drv.so (0x7fa06d0bb000+0x4914) [0x7fa06d0bf914]
[    25.921] (EE) 2: /usr/lib/xorg/modules/input/synaptics_drv.so (0x7fa06d0bb000+0x6802) [0x7fa06d0c1802]
[    25.921] (EE) 3: /usr/lib/xorg/Xorg (0x5635c3043000+0x1baa43) [0x5635c31fda43]
[    25.921] (EE) 4: /usr/lib/xorg/Xorg (0x5635c3043000+0x1bd141) [0x5635c3200141]
[    25.921] (EE) 5: /usr/lib/xorg/Xorg (0x5635c3043000+0x1ba88e) [0x5635c31fd88e]
[    25.922] (EE) 6: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7fa079b91000+0x76db) [0x7fa079b986db]
[    25.922] (EE) 7: /lib/x86_64-linux-gnu/libc.so.6 (clone+0x3f) [0x7fa0798c188f]
[    25.922] (EE) 
[    26.934] (EE) ETPS/2 Elantech Touchpad: Read error 19

If you require any other information, please let me know. Your help is much appreciated.

Found a solution!

TLDR: I uninstalled this package

sudo apt-get remove xserver-xorg-input-synaptics

https://askubuntu.com/a/1128544/870300