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Narrowed scan, turned on Live Update, and much, much better, but still challenges.
Latitude ~$/usr/src/SoftwareDefinedRadio/Scanner/rtl-sdr-src/RTLSDR-Scanner-master/src/rtlsdr_scan.py
/usr/lib/python2.7/site-packages/matplotlib/__init__.py:1005: UserWarning: This call to matplotlib.use() has no effect
because the the backend has already been chosen;
matplotlib.use() must be called *before* pylab, matplotlib.pyplot,
or matplotlib.backends is imported for the first time.

warnings.warn(_use_error_msg)
RTLSDR Scanner

Found Rafael Micro R820T tuner
Found Rafael Micro R820T tuner
Found Rafael Micro R820T tuner
Exact sample rate is: 2000000.052982 Hz
Exception in thread Thread-3:
Traceback (most recent call last):
File "/usr/lib/python2.7/threading.py", line 551, in __bootstrap_inner
self.run()
File "/usr/lib/python2.7/threading.py", line 504, in run
self.__target(*self.__args, **self.__kwargs)
File "/usr/lib/python2.7/multiprocessing/pool.py", line 369, in _handle_results
cache[job]._set(i, obj)
File "/usr/lib/python2.7/multiprocessing/pool.py", line 533, in _set
self._callback(self._value)
File "/usr/src/SoftwareDefinedRadio/Scanner/rtl-sdr-src/RTLSDR-Scanner-master/src/main_window.py", line 525, in on_process_done
self.update_plot()
File "/usr/src/SoftwareDefinedRadio/Scanner/rtl-sdr-src/RTLSDR-Scanner-master/src/main_window.py", line 700, in update_plot
scale_plot(self.graph, self.settings, updateScale)
File "/usr/src/SoftwareDefinedRadio/Scanner/rtl-sdr-src/RTLSDR-Scanner-master/src/plot.py", line 198, in scale_plot
axes.set_ylim(auto=True)
File "/usr/lib/python2.7/site-packages/matplotlib/axes.py", line 2762, in set_ylim
self.viewLim.intervaly = (bottom, top)
File "/usr/lib/python2.7/site-packages/matplotlib/transforms.py", line 937, in _set_intervaly
self.invalidate()
File "/usr/lib/python2.7/site-packages/matplotlib/transforms.py", line 131, in invalidate
return self._invalidate_internal(value, invalidating_node=self)
File "/usr/lib/python2.7/site-packages/matplotlib/transforms.py", line 155, in _invalidate_internal
invalidating_node=self)
File "/usr/lib/python2.7/site-packages/matplotlib/transforms.py", line 155, in _invalidate_internal
invalidating_node=self)
File "/usr/lib/python2.7/site-packages/matplotlib/transforms.py", line 155, in _invalidate_internal
invalidating_node=self)
File "/usr/lib/python2.7/site-packages/matplotlib/transforms.py", line 2141, in _invalidate_internal
invalidating_node=invalidating_node)
File "/usr/lib/python2.7/site-packages/matplotlib/transforms.py", line 155, in _invalidate_internal
invalidating_node=self)
File "/usr/lib/python2.7/site-packages/matplotlib/transforms.py", line 2141, in _invalidate_internal
invalidating_node=invalidating_node)
File "/usr/lib/python2.7/site-packages/matplotlib/transforms.py", line 155, in _invalidate_internal
invalidating_node=self)
File "/usr/lib/python2.7/site-packages/matplotlib/transforms.py", line 153, in _invalidate_internal
for parent in self._parents.itervalues():
File "/usr/lib/python2.7/weakref.py", line 147, in itervalues
for wr in self.data.itervalues():
RuntimeError: dictionary changed size during iteration

^CProcess PoolWorker-1:
Traceback (most recent call last):
File "/usr/lib/python2.7/multiprocessing/process.py", line 258, in _bootstrap
self.run()
File "/usr/lib/python2.7/multiprocessing/process.py", line 114, in run
self._target(*self._args, **self._kwargs)
File "/usr/lib/python2.7/multiprocessing/pool.py", line 99, in worker
put((job, i, result))
File "/usr/lib/python2.7/multiprocessing/queues.py", line 390, in put
return send(obj)
KeyboardInterrupt

Latitude ~$

Found .rtlsdr-scanner in my home directory, though no mention of it anywhere.

saveWarn=0
file1=
file2=
file3=
file4=
file5=
annotate=1
retainScans=0
fadeScans=1
maxScans=5
start=97
stop=98
mode=0
dwell=0.032
nfft=1024
liveUpdate=1
calFreq=1575.42
autoScale=1
yMax=-44
yMin=-50
index=0
[Devices]
[Devices/Server]
serial=
isDevice=0
server=localhost
port=1234
gain=0
lo=0
calibration=0
offset=250000
[Devices/Generic\ RTL2832U]
serial=77771111153705700
isDevice=1
server=localhost
port=1234
gain=0
lo=0
calibration=0
offset=100000