Spyder crashes after Monitor Scale change

Description

Spyder crashes after closing (“dismiss”) the Monitor Scale change detected pop-up on remote machine.

What steps will reproduce the problem?

Specific scenario:

1. Connect to a Remote Desktop with one monitor scale size.
2. Open Spyder on that Remote Desktop machine.
3. Close Remote Desktop connection (keep Spyder open on the remote machine).
4. Re-connect to the same Remote Desktop with a different monitor scale size (e.g. a different local machine).
5. Spyder produces Monitor Scale change detected pop-up. Click dismiss.
6. Spyder will crash/close with no error thrown.

Note: monitor scale change pop up seems to work normally when I move Spyder (in the RD window) between monitors on the local machine.

Pure speculation: could it be that there are three monitor scale changes going on (local machine #1 > remote machine (when RD connection from LM1 is closed) > local machine #2) which is what’s causing the issue?

Versions

• Spyder version: 4.1.5
• Python version: 3.8.3
• Qt version: 5.9.7
• PyQt5 version: 5.9.2
• Operating System: Windows 10

Dependencies

# Mandatory:
atomicwrites >=1.2.0           :  1.4.0 (OK)
chardet >=2.0.0                :  3.0.4 (OK)
cloudpickle >=0.5.0            :  1.6.0 (OK)
diff_match_patch >=20181111    :  20200713 (OK)
intervaltree                   :  None (OK)
IPython >=4.0                  :  7.18.1 (OK)
jedi =0.17.1                   :  0.17.1 (OK)
nbconvert >=4.0                :  5.6.1 (OK)
numpydoc >=0.6.0               :  1.1.0 (OK)
paramiko >=2.4.0               :  2.7.2 (OK)
parso =0.7.0                   :  0.7.0 (OK)
pexpect >=4.4.0                :  4.8.0 (OK)
pickleshare >=0.4              :  0.7.5 (OK)
psutil >=5.3                   :  5.7.2 (OK)
pygments >=2.0                 :  2.6.1 (OK)
pylint >=1.0                   :  2.6.0 (OK)
pyls >=0.34.0;<1.0.0           :  0.34.1 (OK)
qdarkstyle >=2.8               :  2.8.1 (OK)
qtawesome >=0.5.7              :  0.7.2 (OK)
qtconsole >=4.6.0              :  4.7.6 (OK)
qtpy >=1.5.0                   :  1.9.0 (OK)
rtree >=0.8.3                  :  0.9.4 (OK)
sphinx >=0.6.6                 :  3.2.1 (OK)
spyder_kernels >=1.9.4;<1.10.0 :  1.9.4 (OK)
watchdog                       :  None (OK)
zmq >=17                       :  19.0.1 (OK)

# Optional:
cython >=0.21                  :  0.29.21 (OK)
matplotlib >=2.0.0             :  3.3.1 (OK)
numpy >=1.7                    :  1.19.1 (OK)
pandas >=0.13.1                :  1.1.1 (OK)
scipy >=0.17.0                 :  1.5.0 (OK)
sympy >=0.7.3                  :  1.6.2 (OK)

[Caseyb87]

You need to check out the PR branch before running Spyder; there are aliases to do that or a manual method involving several steps, but the easiest way is to just download and use hub (e.g. with conda install -c conda-forge hub, or with choco, snoop or as a standalone executable), a git wrapper from Github. Once you install it, you just run hub pr checkout 14696 to check out the above PR #14696 .

Thank you. I tried as you suggested but got a “Not Found” error - must have done something wrong there. In the end, I just copied/pasted new mainwindow.py file into the installation directory and it worked!

I was able to connect/disconnect/reconnect from the remote machine with different local machines and Spyder did not crash. Got the warning (only once), clicked dismiss and was able to continue as expected.

[bilderbuchi]

Thanks for checking, I did not get the opportunity to quickly test this time around! And also thanks for the fix, of course! 👍