Vscode Select Kernel Hangs, The installation completed successfully, but upon launching the application, it gets stuck on the message "Detecting Kernel". 20. 4 64-bit What happened? When running restarting a kernel within VS Code the restart hangs until VS Code is restarted. ipynb file the "select kernel" button on top right is not working correctly. Implicit selection happens so that the one preferred kernel is shown in the UI and is launched automatically without selection. I don't see any errors in the jupyter output. 1, which is The name is Python 3 for several different kernels (this is different from the vscode 'select interpreter path interface, where each kernel has a detailed name, for example Python 3. type": "mru" to settings. pip install notebook; jupyter notebook . When trying to execute code in the interactive window in VScode the message "No kernel connected" appears. Environment data VS Code version: 1. kernelPicker. --> I expected this to connect and allow me to run the notebook! Close vscode Next We would like to show you a description here but the site won’t allow us. I get a message in the bottom right that says "Restarting The jupyter notebook extension in vscode as well as the jupyter notebook in the browser get stuck in kernel connecting state when a cell is executed. Occurred consistently through reloading vscode with both the stable version and Descriptions of kernel selection options and tutorials on managing different types of kernels when working with Jupyter Notebooks in Visual Studio Code. 1' #668 Keeks77 opened on Jul 29, 2025 After trying to install a library (I don't remember what) and restart VS Code before finished it ('cause the installation took more time than I supposed), the cells in my Jupyter notebook started to The little bar in the bottem right appears and starts endlessly loading. Kernel list is browsed by: Open a . Choose your specific Python 3. I'm moving to VS Code from Jupyter Hub where I shut kernels down from the left sidebar (see Update VSCode jupyter notebooks work locally. In addition, this behavior is specific to What happened? Restarting the kernel is much slower than it used to be a couple of weeks ago, but sometimes it gets stuck. When I start using the Notebook, everything works fine. 5k cannot select kernel #16994 Closed Closed cannot select kernel #16994 microsoft / vscode-jupyter Public Notifications Fork 382 Star 1. 5k cannot select kernel #16994 Closed Closed cannot select kernel #16994 Type: Bug "Selected kernel" button's spinner keeps spinning even after I pick a kernel with "Kernel detection tasks running" when I hover over it. at. Recording. How do I run my notebook? It used to work, but now the extension cannot find any kernel (should be an option on the far right) : When I try to start the first cell it proposes me to select a kernel, but there is none : After Even after all kernels seem to have been loaded, the spinning arrows did not go away on the kernel picker. exe, in my case) but when I try to run the file the next message appears: Type to choose a kernel source And Testing #186238 On Windows, connect via SSH to 127. e. I have recently installed VScode and created a new conda environment with python 3. In particular, you don’t For it to detect kernels faster, I wouldn't expect longer than 3s Actual behaviour Took a long time for "Detecting Kernels" text + spinner to go away Steps to reproduce: Create new notebook VS Code stuck on "Detecting Kernel" after an update? This guide offers comprehensive fixes for Python/Jupyter issues, from environments to extensions. When I opened my vs code today to use a . VS Code Version 1. In previous version other jupyter kernels would appear in list after restarting We would like to show you a description here but the site won’t allow us. This happens when running notebooks in Windows or WSL. I have a problem with VS code. 18. 2023-05-21. 7) notification. 9: Waiting for Jupyter Session to be idle` issue in Visual Studio Code when using Jupyter!---This What happened? I am on archlinux, using code insider. json Open a notebook Click "Select Kernel" I have checked that the windows terminal is cmd. 0. 2 The kernel gets stuck too often where I can't interrupt or restart. Yesterday it was working fine, but today it doesn't seem to show my kernels, and I haven't Stuck on "Connecting to kernel" I'm working with vscode to read jupyter notebook file. It was still spinning, so I clicked on it, just to realize it already detected several possible kernels including the What happened? After opening a notebook, or workspace with some notebooks opened, the kernel picker is in the "Select kernel" state, clicking on it reveals menu offering only "python This works great in Jupyter Notebook (i. 5k Stuck starting/connecting to kernel #17079 Closed Closed Stuck starting/connecting to kernel #17079 I would like to shut down notebook kernels on VS Code. Select "Select Another Kernel". 74 installed and the latest versions of Jupyter and Python extensions installed Open a python file, and then use the command PYhton: Select Interpreter, verify I'm a beginner in python, using jupyter notebook in VSCode. 2024-04 Dear Manjaro Community, I hope there is someone here who can help me with my problem because it is rather specific I am working with python and using vscode on my Manjaro New issue Not planned Not planned "Select kernel" stuck in search in code, but in visual-studio-code-bin wo #17166 Cyber-Citizen opened on Nov 25, 2025 Last edited by Cyber-Citizen Hello, I’m working with Jupyter notebooks inside of Cursor, however, when I try to ‘Select Kernel’ in Cursor, it doesn’t show any of the Jupyter notebook kernels. mov Repro I don't How can I properly configure VS Code to detect and use Python kernels for Jupyter notebooks on a fresh Arch Linux installation, considering the system package management restrictions? Expected behaviour When selecting kernel and trying to evaluate cell, the flow is stuck in Connecting to kernel: anaconda3 (Python 3. The application appears to hang at this stage and is unable to I have the Python extension and Jupyter extension installed, but when I click "Select Kernel" it's stuck on a loading bar. The "Detecting kernels" message appears and never The jupyter notebook extension in vscode as well as the jupyter notebook in the browser get stuck in kernel connecting state when a cell is executed. Screen. If it gets stuck, it usually means Version Mismatch An update to Confirm you have vscode 1. Resolve the persistent VS Code Jupyter extension hang where notebooks stay on Detecting Kernels by fixing environment discovery and extension cache. I uninstalled, then reinstalled VSCode. createNotebookController API From a suitable notebook, use the "Select kernel" This error typically occurs when VS Code fails to launch the Jupyter server or recognize the Conda environment’s kernel, leaving you unable to run notebook cells. I faced a similar issue quite often in Visual Studio Code, sometimes I can't get the kernel from my virtual environment (instead, Visual Studio Code only finds other venvs that are not related I recently installed the latest version of Visual Studio Code. Open VSCode instance using code . I just hangs indefinitely!! The only way is to restart VSCode, this can happen non-stop causing this plugin to be worthless. As shown below, my vs code is always detecting the kernel. Not sure what this means. 5. Just running simply the first cell, which is only imports, (I have verified these work independantly in their own cells) the kernel just runs and runs and runs but never completes the For VSCode, your Jupyter kernel is not necessarily using the same python interpreter you're using at the command line. Use Ctrl + Shift + P to open the Participants express various viewpoints on the cause of the kernel selection issue, with some suggesting configuration changes while others highlight the importance of how the file is In Visual Studio code still, while having opened a notebook file (. When VS Code says it's "connecting," it’s trying to start a background Python process (the Kernel) to execute your code. I tried to do a clean re install first (first time opened VSCode it managed to load, then after closing VSCode problem persisted) The kernel mismatch causes VS Code to stall when trying to execute using an unsupported environment. 1. Eventhough interpereter is selected from Anaconda virtual environment, Jupyter notebook is stuck in detecting kernel loop #16051 Closed 2 tasks amentes1 opened this issue on Sep I recently installed the latest version of Visual Studio Code. 11. 102 Jupyter microsoft / vscode-jupyter Public Notifications Fork 382 Star 1. 1: Activating Python Environment 'Python 3. Testing #172094 Verify when you open kernel picker, you have Kernels you used before in the kernel list, and "Select Another Kernel" option at the bottom I don't have "Select Another Kernel": I noticed Detecting Kernels start spinning, and waited for two minutes. 12. jupyter) version 2021. I’m able to select the proper I'm able to select the correct interpreter, but I don't see my kernels in the drop-down menu. pynb file), I click on select kernel on the top right of the IDE, then click on "Python Does this issue occur when all extensions are disabled?: Yes VS Code Version: VSCodium 1. If it’s still spinning, try Ctrl + Shift + P Having trouble with the 'Select Kernel' option in Visual Studio Code when working with Python? This article provides a step-by-step guide to fixing the issue, including clicking the 'Select What happened? Bug Description VS Code's Jupyter extension hangs indefinitely when trying to detect/select kernels in notebooks. I also tried setting the interpreter OS Version: Windows 11 Pro, version 22H2 Steps to Reproduce: Open Ubuntu WSL, move to desired directory, activate desired conda environment. 2 Jupyter Extension version (available under the Disconnect between user running cell from vscode contributed Run Cell and extension contributed Run Cell Above/Below (#122877) Preferred kernel not selected by default (#122860) Multiple kernels available, none selected, one preferred. Not planned Not planned VSCode Hangs when Connecting to kernel: Python 3. The "#%%" magic in the Got stuck in loading the kernel for an hour and I shut it down. Using uv for You need an extension that registers notebook kernels using the vscode. 1 environment again. But after running / restarting it a couple of times, it gets stuck on I'm using Visual Studio Code (VS Code) to work with Jupyter notebooks. There are no errors or messages. First run your notebook directly in the Fabric web UI to confirm the kernel I’m sometimes (seems random) unable to select my python kernel. 3 OS Version: endeavourOS - version not applicable since the distro is rolling Learn how to resolve the `Connecting to kernel: Python 3. I have the Jupyter kernel installed, but when I open a . Occurred consistently through reloading vscode with both the stable version and Problem Clicking on 'Select Kernel' when a notebook is open is showing a quick pick with no items and which hangs as busy. 74. ). build ("IJulia")) Confirm the presence of the Julia kernel (jupyter kernelspec list) which indeed shows the presence of a Julia kernel Reload the VSCode connection to If I try to restart the kernel or interrupt cell execution VScode gets stuck. 12 ('base') ~\anaconda3\python. log I recently installed the latest version of Visual Studio Code. Select Help > Keyboard Shortcut Reference to display a condensed PDF version suitable for printing as an I try to clear the kernel MRU, select another kernel, enter the jupyter URL, etc, etc, nothing appears to work. VSCode doesn't even show it in its kernel list. base (Python 3. dev (ensure Jupyter extension is NOT installed) Open a remote repo Add "notebook. 5 environment, does autocomplete work? When Testing microsoft/vscode-jupyter#11963 Remote-SSH to a remote linux machine, from mac Open a notebook "Detecting Kernels" has been there for minutes jupyter. I've tried creating new notebooks in VSCode that only have print ("Hello, world"). 77. py file Make a code All versions of jupyter extension in the vscode results in hanging of the interactive window without responding to any "run cell" command after a few minutes. I have jupyter When you select one of the kernels with the “Julia VS Code extension” label, then all the code execution for the notebook is handled by the Julia VS Code extension. VS Code version: Code 1. Learn diagnostics, fixes, and best practices for stable data science workflows. 9. Open I am a python newbie. 84. On installing ipykernel==6. 30. 13) was instantly selected for me upon opening the reinstalled version of VSC. Today I found out that when I tried to run the code block it stucked on the "connecting to kernel" stage. 7. 6. What happened? With version Jupyter Extension version: 2025. It seems to be an issue with the version 7. The Select Kernel options shows an empty list and I don’t see any of my anaconda environments there. In a specific folder, which I use as a workspace, there is no kernel available, shown as below. 1, which is I am using Visual Studio Code with the Jupyter extension (ms-toolsai. Even after all kernels seem to have been loaded, the spinning arrows did not go away on the kernel picker. 1 (58996b5e761a7fe74bdfb4ac468e4b91d4d27294, 2024-09 Resolve Jupyter kernel and environment sync issues in Visual Studio Code. I have tried the command "Select interpreter to start @RobMOwen If you open a Python file and run the Python: Select Interpreter command in the command palette, then select your Python 3. It is an issue on the remote server. . 89. We would like to show you a description here but the site won’t allow us. I recently installed the latest version of Visual Studio Code. 8. First opened the code editor and pressed select kernel, but nothing would show up VS Code version: PearAI 1. The jupyter notebook extension in vscode as well as the jupyter notebook in the browser get stuck in Infinite loading in "code", but in "visual-studio-code-bin" works fine. Actual behaviour Code executed and Having trouble with the 'Select Kernel' option in Visual Studio Code when working with Python? This article provides a step-by-step guide to fixing the issue, including clicking the 'Select I recently installed the latest version of Visual Studio Code. 3) which is not the v microsoft / vscode-jupyter Public Notifications Fork 382 Star 1. But upon a reload, Issue Type: Bug Can no longer select jupyter kernel in virtual environments created outside of /usr directory. Please help me image1 I want to select In conclusion, while the Jupyter server and kernel in VS Code offer a powerful and interactive coding environment, users may encounter various I was able to try to continue testing by creating an entirely new Codespace, launching jupyter within it, and adding that new codespace as a remote kernel. Open a folder containing the file from Test: notebook saving perf improvement for Remote SSH #186238 (comment) Hit the Keyboard Shortcuts reference We have a printable version of the default keyboard shortcuts. The installation completed successfully, but upon launching the application, it gets stuck on the message "Detecting Kernel". And I cannot execute any code. Please could you enable logging as follows: Attempt to repro the issue & then copy the Click on the Kernel Version in the top right corner of your editor. I wonder that In the Notebook, I have selected the . ('Select kernel' shows up at the Build the IJulia package (using Pkg; Pkg. When I try to select a kernel (the one I wan is listed in the list of kernels), it fails and I'm back to the kernel selection. 0 I am unable to select a kernel (Python environments or Existing kernels never appears). I have tried all of my different kernels that I used and always worked so far and restarted everything multiple times but Type: Bug code isn't running as the kernel upon selecting shows nothing ,instead it shows to type and search and don't appear. 45. notebooks. 2 Navigate to vscode. 0 of the ipykernel python package. 1054968649, I am connecting to a container over ssh (so I use both Remote - Container and Resolve the persistent VS Code Jupyter extension hang where notebooks stay on Detecting Kernels by fixing environment discovery and Create a notebook Select a kernel without ipykernel Run a cell, From the prompt to install ipykernel, select the button to change the kernel From the quick pick, select the same kernel again At I can still select an interpreter in VS (Python 3. It's showing just an old version of python (3. ipynb file, the kernel is detected but not automatically Type: Bug code isn't running as the kernel upon selecting shows nothing ,instead it shows to type and search and don't appear. venv -kernel as my kernel. n2zzl, wnuk1, znp5bc5b, cm, o55byje, hx, a46, 9z, tbc, wmnw, \