Issues

Issues

• IOPub drops messages without any error once 1000 are queued (common with transport encryption)

  ipython/ipykernel#1590 · opened on Nov 3, 2026

• multiprocessing with functions defined in a cell hangs or fails on Python 3.14

  ipython/ipykernel#1587 · opened on Oct 30, 2026
  1

• Stock ipykernel_launcher raises DeprecationWarning on startup and PendingDeprecationWarning on shutdown under PYTHONWARNINGS=error (Python 3.12+)

  ipython/ipykernel#1582 · opened on Oct 26, 2026

• Kernel can remain alive but never answer kernel_info during startup under amd64 emulation

  ipython/ipykernel#1577 · opened on Oct 15, 2026

• possible race condition during shutdown: zmq aborts and dumps core

  ipython/ipykernel#1569 · opened on Sep 28, 2026
  3

• post_execute fires during comm_msg handling on a subshell, so output published from the hook is parented to the comm_msg and dropped by frontends

  ipython/ipykernel#1564 · opened on Sep 21, 2026
  3

• Shell reply sent raw on the ROUTER can drop the ZMQStream wake-up; a request arriving in that window is not read until the next connection

  ipython/ipykernel#1554 · opened on Sep 7, 2026
  1

• Interrupt on swallowed KeyboardInterrupt exceptions (SIGINT) when pressing twice (within 5 seconds)

  ipython/ipykernel#1550 · opened on Aug 25, 2026
  1

• Removing @register_integration("asyncio") and def loop_asyncio(kernel):

  ipython/ipykernel#1532 · opened on Jun 18, 2026

• Segfault launching ipykernel on Python 3.12.3 in VS Code Jupyter (works on Python 3.11)

  ipython/ipykernel#1512 · opened on Apr 16, 2026

• ipykernel 7.x does not schedule async background tasks after cell completion

  ipython/ipykernel#1510 · opened on Mar 12, 2026

• how to integrate custom event loop in ipykernel 7.x

  ipython/ipykernel#1490 · opened on Jan 13, 2026
  2

• Using the recent ipykernel 7.x causes plots to not show up from ipympl widgets.

  ipython/ipykernel#1476 · opened on Nov 19, 2025
  2

• Shows wrong python version in "Select a Python Environment"

  ipython/ipykernel#1474 · opened on Nov 12, 2025

• Freezes in nbclassic with ipykernel 7.1

  ipython/ipykernel#1471 · opened on Nov 10, 2025
  3

• ipykernel should use default WindowsProactorEventLoopPolicy rather than WindowsSelectorEventLoopPolicy for windows

  ipython/ipykernel#1468 · opened on Nov 5, 2025
  1

• ipykernel 7.0.1 - Jupyter autocomplete delay

  ipython/ipykernel#1452 · opened on Oct 14, 2025
  2

• Inconsistent character encoding from windows output

  ipython/ipykernel#1449 · opened on Oct 14, 2025
  1

• ipykernel 7.0.0 release with subshells

  ipython/ipykernel#1438 · opened on Oct 9, 2025
  11

• Should initialization errors be exposed to the user?

  ipython/ipykernel#1408 · opened on Jul 16, 2025

• Ipykernel releases and branches

  ipython/ipykernel#1399 · opened on Jun 24, 2025
  3

• Update embedding examples

  ipython/ipykernel#1392 · opened on Apr 13, 2025
  1

• rerun cell with datafame make memory leak

  ipython/ipykernel#1391 · opened on Apr 13, 2025

• enable_pylab broken on invalid kwarg with IPython 9.0

  ipython/ipykernel#1382 · opened on Mar 21, 2025
  1

• New event loop integration system

  ipython/ipykernel#1371 · opened on Feb 27, 2025
  2