cannot use plot anymore - 2d qt crashes the kernel (Jupyter notebook).

💬 Support & Discussions
1

Hiya,

I was going fine for six months or so, but within the last 2-4 weeks all of the plots started crashing my Jupyter Notebook kernel. I’ve tried reinstalling a bunch of pyqt things. However, I am a complete noob and nothing has worked. The error and my system info are below.

EXAMPLE
The following says “Using qt as 2D backend.” and then it just quits the kernel.

tstart = data_raw.annotations.onset[(data_raw.annotations.description) == ‘Instructions’]
data_raw.plot(n_channels=len(data_raw.ch_names), duration=120, show_scrollbars=True,
scalings=‘auto’, clipping=None, start=tstart);

MY SYSTEM INFO
(base) Breas-MacBook-Pro:fNIRS_ParticipantRawData breachouinard$ python -c “import mne; mne.sys_info()”
Platform: macOS-10.16-x86_64-i386-64bit
Python: 3.8.3 (default, Jul 2 2020, 11:26:31) [Clang 10.0.0 ]
Executable: /Users/breachouinard/opt/anaconda3/bin/python
CPU: i386: 4 cores
Memory: 16.0 GB

mne: 1.3.1
numpy: 1.22.3 {unknown linalg bindings}
scipy: 1.8.1
matplotlib: 3.2.2 {backend=MacOSX}

sklearn: 0.23.1
numba: 0.50.1
nibabel: 3.2.1
nilearn: 0.9.1
dipy: Not found
openmeeg: Not found
cupy: Not found
pandas: 1.4.1
pyvista: Not found
pyvistaqt: Not found
ipyvtklink: Not found
vtk: Not found
qtpy: 1.9.0 {PyQt5=5.15.2}
ipympl: 0.9.2
pyqtgraph: 0.13.2
pooch: v1.7.0

mne_bids: Not found
mne_nirs: Not found
mne_features: Not found
mne_qt_browser: 0.4.0
mne_connectivity: Not found
mne_icalabel: Not found

2

You could try if the Matplotlib backend works, i.e. mne.viz.set_browser_backend("matplotlib").

3

Thanks Clemens! I will try it. Yesterday I typed in “mne.viz.set_browser_backend(‘qt’)” before every single xxx.plot() command, and that seemed to work too. But it would be handy if I didn’t have to type it everytime, so I will try your fix as well. Cheers.

Brea Ch