Graphics backend

[marcolova]

Description

What steps will reproduce the problem?

I changed graphic backend to Automatic then I restarted Spyder. Spyder attempt di connect to kernel without success.
So I tried to change graphic backend and as soon as I confirm my choiche, the issue reporter window appeared.

Traceback

Traceback (most recent call last):
  File "C:\Users\marco.lovadina\AppData\Local\Programs\Spyder\pkgs\spyder\plugins\preferences\widgets\configdialog.py", line 127, in accept
    configpage.apply_changes()
  File "C:\Users\marco.lovadina\AppData\Local\Programs\Spyder\pkgs\spyder\plugins\preferences\api.py", line 110, in apply_changes
    self.apply_callback()
  File "C:\Users\marco.lovadina\AppData\Local\Programs\Spyder\pkgs\spyder\plugins\preferences\api.py", line 142, in <lambda>
    self._apply_settings_tabs(self.changed_options))
  File "C:\Users\marco.lovadina\AppData\Local\Programs\Spyder\pkgs\spyder\plugins\preferences\api.py", line 170, in _apply_settings_tabs
    self.apply_settings(options)
  File "C:\Users\marco.lovadina\AppData\Local\Programs\Spyder\pkgs\spyder\api\preferences.py", line 104, in wrapper
    func(opts)
  File "C:\Users\marco.lovadina\AppData\Local\Programs\Spyder\pkgs\spyder\plugins\ipythonconsole\plugin.py", line 454, in apply_plugin_settings
    for client in self.clients]
  File "C:\Users\marco.lovadina\AppData\Local\Programs\Spyder\pkgs\spyder\plugins\ipythonconsole\plugin.py", line 454, in <listcomp>
    for client in self.clients]
  File "C:\Users\marco.lovadina\AppData\Local\Programs\Spyder\pkgs\spyder\plugins\ipythonconsole\widgets\shell.py", line 353, in get_matplotlib_backend
    blocking=True).get_matplotlib_backend()
  File "C:\Users\marco.lovadina\AppData\Local\Programs\Spyder\pkgs\spyder_kernels\comms\commbase.py", line 550, in __call__
    raise CommError("The comm is not connected.")
spyder_kernels.comms.commbase.CommError: The comm is not connected.

Versions

• Spyder version: 5.1.5
• Python version: 3.7.9
• Qt version: 5.12.10
• PyQt5 version: 5.12.3
• Operating System: Windows 10

Dependencies

# Mandatory:
atomicwrites >=1.2.0          :  1.4.0 (OK)
chardet >=2.0.0               :  4.0.0 (OK)
cloudpickle >=0.5.0           :  2.0.0 (OK)
cookiecutter >=1.6.0          :  1.7.3 (OK)
diff_match_patch >=20181111   :  20200713 (OK)
intervaltree                  :  None (OK)
IPython >=7.6.0               :  7.27.0 (OK)
jedi >=0.17.2;<0.19.0         :  0.18.0 (OK)
jsonschema >=3.2.0            :  3.2.0 (OK)
keyring >=17.0.0              :  23.2.1 (OK)
nbconvert >=4.0               :  6.1.0 (OK)
numpydoc >=0.6.0              :  1.1.0 (OK)
paramiko >=2.4.0              :  2.7.2 (OK)
parso >=0.7.0;<0.9.0          :  0.8.2 (OK)
pexpect >=4.4.0               :  4.8.0 (OK)
pickleshare >=0.4             :  0.7.5 (OK)
psutil >=5.3                  :  5.8.0 (OK)
pygments >=2.0                :  2.10.0 (OK)
pylint >=2.5.0;<2.10.0        :  2.9.6 (OK)
pyls_spyder >=0.4.0           :  0.4.0 (OK)
pylsp >=1.2.2;<1.3.0          :  1.2.2 (OK)
pylsp_black >=1.0.0           :  None (OK)
qdarkstyle =3.0.2             :  3.0.2 (OK)
qstylizer >=0.1.10            :  0.2.1 (OK)
qtawesome >=1.0.2             :  1.0.3 (OK)
qtconsole >=5.1.0             :  5.1.1 (OK)
qtpy >=1.5.0                  :  1.11.1 (OK)
rtree >=0.9.7                 :  0.9.7 (OK)
setuptools >=49.6.0           :  58.0.4 (OK)
sphinx >=0.6.6                :  4.2.0 (OK)
spyder_kernels >=2.1.1;<2.2.0 :  2.1.1 (OK)
textdistance >=4.2.0          :  4.2.1 (OK)
three_merge >=0.1.1           :  0.1.1 (OK)
watchdog                      :  2.1.5 (OK)
zmq >=17                      :  22.2.1 (OK)

# Optional:
cython >=0.21                 :  0.29.24 (OK)
matplotlib >=2.0.0            :  3.4.3 (OK)
numpy >=1.7                   :  1.19.3 (OK)
pandas >=1.1.1                :  1.3.3 (OK)
scipy >=0.17.0                :  1.7.1 (OK)
sympy >=0.7.3                 :  1.8 (OK)

[ccordoba12]

Hey @marcolova, thanks for reporting. This is a duplicate of #15875 and it'll be solved in our next version (5.2.0), to be released next month.

In the meantime, please set the Inline backend in our Preferences and run the command %matplotlib qt in the console when you want to use interactive figures.