#1110972 mnemosyne: The whole program freezes after some operations (Browsing cards)

Package:
mnemosyne
Source:
mnemosyne
Submitter:
Maksym Minenko
Date:
2026-02-02 14:33:02 UTC
Severity:
normal
#1110972#5
Date:
2025-08-13 06:55:59 UTC
From:
To:
Dear Maintainer,

From the Browse cards windows, if I open a card, and then click Preview a (smaller) window does open, but after I close it the main program freezes completely (at the Browse cards window), so I have to manually kill the process even to close it.
#1110972#10
Date:
2025-09-20 16:59:27 UTC
From:
To:
Hi,

I can confirm that as of my recent mnemosyne install, this still is
happening.
#1110972#15
Date:
2026-02-01 17:46:21 UTC
From:
To:
Dear Maintainer,
I found that Mnemosyne always freezes, after I open the Edit Card dialog.
I tested the program also on a second machine, same Debian Release, also fully
updated.
I reinstalled Mnemosyne and also all Python packages - exactly the same
problem.
In the Process Manager, I noted that several instances of QtWebEngineProcess
were running.
When I killed one after the other, the Answer and Question field of the
Mnemosyne Interface disappeared, also one after the other. The last instance of
QtW was not responsive to the kill-signal, so I had to kill the Mnemosyne
process, which also killed QtW. The same behaviour on the second machine. I
also switched between Wayland and X11, which made no difference.

I filed a bugreport at mnemosyne-prof-users. Peter suggested to file this
bugreport for debian, since I used the distro version of Mnemosyne.
#1110972#20
Date:
2026-02-02 14:25:18 UTC
From:
To:
Hi,

I removed the mnemosyne package with synaptic and all packages that were no
longer needed with apt autoremove.

Then I installed mnemosyne as described on their webpage with pipx install
mnemosyne-proj.

The program also hangs, after opening the 'preview window' from the 'edit card'
dialog.

I had to kill mnemosyne (started from the console) with ^c. Now I get a more
verbose error message as below:

snip -------------

^CLog body:
 An unexpected error has occurred.
Please forward the following info to the developers:

Traceback (innermost last):
  File "/home/juergen/.local/share/pipx/venvs/mnemosyne-
proj/lib/python3.13/site-packages/mnemosyne/pyqt_ui/review_wdgt.py", line 449,
in restore_focus
    def restore_focus(self):

 KeyboardInterrupt

An unexpected error has occurred.
Please forward the following info to the developers:

Traceback (innermost last):
  File "/home/juergen/.local/share/pipx/venvs/mnemosyne-
proj/lib/python3.13/site-packages/mnemosyne/pyqt_ui/review_wdgt.py", line 449,
in restore_focus
    def restore_focus(self):

 KeyboardInterrupt
Failed to make OpenGL context current for clean-up, OpenGL resources will not be
destroyed.

-------------

Jürgen