Description of problem:
When I try to run gnome-system-monitor I get the error:
"Gtk-Message: Failed to load module "pk-gtk-module"

GLib-GIO-ERROR **: Settings schema 'org.gnome.gnome-system-monitor' does not contain a key named 'cpu-color4'
aborting...
Aborted (core dumped)"

Version-Release number of selected component (if applicable):
2.99.2-1

How reproducible:
Every time

Steps to Reproduce:
1. try to run
  
Actual results:
Error and crash.

Expected results:
Open normally

Additional info:
"$ lscpu 
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                8
On-line CPU(s) list:   0-7
Thread(s) per core:    2
Core(s) per socket:    4
CPU socket(s):         1
NUMA node(s):          1
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 42
Stepping:              7
CPU MHz:               800.000
BogoMIPS:              4390.04
Virtualization:        VT-x
L1d cache:             32K
L1i cache:             32K
L2 cache:              256K
L3 cache:              6144K
NUMA node0 CPU(s):     0-7"