Vscode Select Kernel Hangs, VSCode doesn't even show it in its kernel list.
Vscode Select Kernel Hangs, Click "Select Kernel", Multiple kernels available, none selected, one preferred. I have the Python extension and Jupyter extension installed, but when I click "Select Kernel" it's stuck on a loading bar. First run your notebook directly in the Fabric web UI to confirm the kernel Jupyter extension is disabled for the workspace, is that sufficient? The restart kernel now completely disappeared. In conclusion, while the Jupyter server and kernel in VS Code offer a powerful and interactive coding environment, users may encounter various Type: Bug SSH to a remote server such as an AWS EC2 server. Kernel list is browsed by: Open a . pip install notebook; jupyter notebook . It's showing just an old version of python (3. notebooks. Yesterday it was working fine, but today it doesn't seem to show my kernels, and I haven't The kernel gets stuck too often where I can't interrupt or restart. If I select "Jupyter: Select kernel" from the command palette, after a few seconds I get a notification . The little bar in the bottem right appears and starts endlessly Actually it sounds like the issue I've ever had. Please could you enable logging as follows: Attempt to repro the issue & then copy the Click on the kernel name (or where it says "Select Kernel") and explicitly choose your Python 3. That worked for me. They were running normally and suddenly an interactive notebook started to What happened? I am on archlinux, using code insider. 1' #668 Keeks77 opened on Jul 29, 2025 Username or email address Password or microsoft / vscode-jupyter Public Notifications Fork 382 Star 1. Open a folder containing the file from Test: notebook saving perf improvement for Remote SSH #186238 (comment) Hit the I try to clear the kernel MRU, select another kernel, enter the jupyter URL, etc, etc, nothing appears to work. If you restart inmediately, the kernel freezes forever and the only solution 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. 30. dev Kill the server Reload window š Detecting Kernels spins Learn how to set the missing `Python kernel` in Visual Studio Code's Jupyter Notebook, ensuring a smooth development experience on macOS. On the OP's problem occurrence, I tried to restart, reinstall and downgrade VSCode, as other answers suggested, but What happened? Recently extension is not recognizing virtual environment's kernel and selecting the global one automatically. The installation completed successfully, but upon launching the application, it gets stuck on the message "Detecting I have recently installed VScode and created a new conda environment with python 3. 1 (58996b5e761a7fe74bdfb4ac468e4b91d4d27294, 2024-09 Now hereās the problem: When i run a cell in my jupyter notebook there seems to be a problem connecting to the kernel. 8, 3. 85. Workaround solve (but still annoying): When Notebook freezes, you need to interrupt kernel and then restart and it works again. 635Z) OS version: Linux Despite having multiple interpreters available (3. The application appears to hang at this stage and is unable to 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 I just had the same issue when I couldn't get the newly created environment to show up in kernel selection window. venv -kernel as my kernel. Menu doesn't load, a never-ending loading animation is displayed When I opened my vs code today to use a . ipynb Click on the "Select kernels" button Textbox opens up with "Type to choose a kernel source" prompt. Note that if I tried the Hier sollte eine Beschreibung angezeigt werden, diese Seite lässt dies jedoch nicht zu. createNotebookController API From a suitable notebook, use the "Select kernel" Iām sometimes (seems random) unable to select my python kernel. I have conda installed and various envs, in the older code and jupyter-plugin versions it worked just fine, but about half or one month ago, when microsoft / vscode-jupyter Public Notifications Fork 384 Star 1. Someone said run "Python: Select interpreter to start Jupyter server", someone also said run"Notebook: Select I'm able to select the correct interpreter, but I don't see my kernels in the drop-down menu. 5k Restarting Kernel hangs on Windows and WSL #17138 Not planned Not planned Restarting Kernel hangs on Windows and In the Notebook, I have selected the . It's not even showing the virtual environment kernel in It stays on the kernel in the conda environment I'm running the jupyter server from. 10. Testing microsoft/vscode#13768 Connect to remote Jupyter server running on localhost in a notebook in insiders. That makes sense now, since I used the Kernel you proposed (the one It seems there's a race condition: When Run is clicked, VS Code doesn't yet have the preferred kernel from extension VSCode then calls extension to get the list of kernels & displays the Jupyter server running: Remote through SSH VSCode extension Expected behaviour Cells NOT running. Click "Select Kernel" / invoke "Notebook: select notebook kernel" in any way. 5 environment, does autocomplete work? When Type: Bug I've tried both release and pre-release and also an older version (2024. When trying to execute code in the interactive window in VScode the message "No kernel connected" appears. 74. build ("IJulia")) Confirm the presence of the Julia kernel (jupyter Testing #172103 open a notebook in a new workspace click run on a cell, this should pop-up the kernel selection close the kernel selection quickpick without selecting anything š cell Hier sollte eine Beschreibung angezeigt werden, diese Seite lässt dies jedoch nicht zu. log Code executed and output shows. dev Run the command "Notebook: Select Notebook Kernel" Nothing appears to happen 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 Continue with Google Continue with Apple Sign in with a passkey microsoft / vscode Public Notifications Fork 41. I have jupyter This works great in Jupyter Notebook (i. 8. In previous version other jupyter kernels would appear in list after restarting Ctrl + Shift + P Jupyter: Filter kernels Select only the kernel you want (in my case, my venv) Go on "Select Kernel" directly on the notebook UI; Select your right kernel. 5k Stuck starting/connecting to kernel #17079 Closed Closed Stuck starting/connecting to kernel #17079 Install the Julia kernel with the built-in Julia package manager (using Pkg; Pkg. Occurred consistently through reloading vscode with both the stable I have tried the command "Select interpreter to start Jupyter server" and selected the correct version of Python, but nothing has changed any time I've tried to run. 3) which is not the version It happens when you have Jupyter installed Play around with Jupyter notebooks a bit, especially using the kernel picker Switch to a new profile Now open a notebook, open kernel picker š Now, the kernel is stuck but apparently nothing is even running! I do not see any cells that are running, yet I cannot click run all and only have the option "interrupt" this is extremely 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 DonJayamanne mentioned this in 2 issues on Dec 16, 2024 Select Kernel spins forever #186364 "detect kernel" present while building codespace vscode-jupyter#13978 DonJayamanne Not planned Not planned VSCode Hangs when Connecting to kernel: Python 3. VSCode doesn't even show it in its kernel list. Run the cell => asks to select kernel. what other python envs are you expecting to see. I have a python Jupyter notebook, when <Enter><Shift> is used, the focus goes to the top of the screen where the message is Select kernel After updating to the latest version of Visual Studio Code (October 2025 update), Jupyter notebooks no longer connect to the Python kernel. The Select Kernel options shows an empty list and I donāt see any of my anaconda environments there. 3k Star 188k Stuck Connecting to kernel: Python 3. e. In a specific folder, which I use as a workspace, there is no kernel available, shown as below. 1 environment again. Kernel Picker displayed when running cells before preferred kernel is auto selected (#108950) Native Notebooks - Default kernel not honored (#114663) VSCode invokes provideKernels This is a basic beginner question. Implicit selection happens so that the one preferred kernel is shown in the UI and is launched automatically without selection. VS Code version: Code 1. ). Occurred consistently through reloading vscode with both the stable version and Resolve the persistent VS Code Jupyter extension hang where notebooks stay on Detecting Kernels by fixing environment discovery and extension cache. It appeared there immediately after I selected my venv/bin/python3 as Descriptions of kernel selection options and tutorials on managing different types of kernels when working with Jupyter Notebooks in Visual Studio Code. ('Select kernel' shows up at the However, many users encounter frustrating roadblocks like **"No Kernel"** (no available Jupyter kernels to select) or **"Python: Not Started"** (the Python kernel fails to initialize) errors. I have the Jupyter extension in VSCode, I also have the jupyter package installed (I can see it running conda list, for example), but I cannot run the Testing #186238 On Windows, connect via SSH to 127. I am unable to select jupyter kernels or other python kernels @gioxc What are you expecting to see in the list. In particular, you 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 I use VSCode to run . In visual-studio-code-bin extension version: 2025. Pick any kernel from the list. 9. 12. 6. I am using Anaconda I'm using Visual Studio Code (VS Code) to work with Jupyter notebooks. 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": Type: Bug Open latest VSCode Insiders. It is weird that the The kernel mismatch causes VS Code to stall when trying to execute using an unsupported environment. 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. Screen. I have the Jupyter kernel installed, but when I open a . Open a . No kernel is First opened the code editor and pressed select kernel, but nothing would show up VS Code version: PearAI 1. One of the features that makes VSCode so powerful is its ability to Learn how Claude Code's sandboxed Bash tool provides filesystem and network isolation for safer, more autonomous agent execution. @RobMOwen If you open a Python file and run the Python: Select Interpreter command in the command palette, then select your Python 3. org, recreate the venv, and register the kernel. 89. The installation completed successfully, but upon launching the application, it gets stuck on the message "Detecting Type: Bug code isn't running as the kernel upon selecting shows nothing ,instead it shows to type and search and don't appear. Both Python and Jupyter work perfectly fine when If your Python came from the Microsoft Store, VS Code/Jupyter may not find kernels. All versions of jupyter extension in the vscode results in hanging of the interactive window without I recently installed the latest version of Visual Studio Code. ipynb file. ipynb file, the kernel is detected but not automatically As for this question, there are different solutions for there is no more information. The installation completed successfully, but upon launching the application, it gets stuck on the message "Detecting I should be able to select Kernel Actual behaviour Infinite loading in "code", but in "visual-studio-code-bin" works fine. By design you will When we only have a couple of notebook controllers created for a notebook type, without any kernel detection task or kernel source commands, the "Select Another Kernel" should not I'm a beginner in python, using jupyter notebook in VSCode. Recording. Iām able to select the proper Type: Bug Even after all kernels seem to have been loaded, the spinning arrows did not go away on the kernel picker. 7. 1 (0ee08df, 2023-12-13T09:47:11. Select VS Code stuck on "Detecting Kernel" after an update? This guide offers comprehensive fixes for Python/Jupyter issues, from environments to extensions. 2025101002 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. On installing ipykernel==6. 1: Activating Python Environment 'Python 3. Steps to reproduce: Start VScode create Jupyter notebook Enter some code in cell, like print ('hello'). 5k Select kernel options missing when after running a jupyter notebook cell in You need an extension that registers notebook kernels using the vscode. ---This video is bas Learn how to resolve the `Connecting to kernel: Python 3. Type: Bug Suddenly my vscode update and can't use Jupyter Notebook, always stuck on connecting to kernel that i usually used VS Code version: Code 1. Learn diagnostics, fixes, and best practices for stable data science workflows. I tried uninstalling and reinstalling the Jupyter extension, deleting and re-creating the virtual environment, removing the Descriptions of kernel selection options and tutorials on managing different types of kernels when working with Jupyter Notebooks in Visual Studio Code. Even after all kernels seem to have been loaded, the spinning arrows did not go away on the kernel picker. 2 VSCode Select Kernel Empty: A Guide Visual Studio Code (VSCode) is a popular code editor that is used by developers of all levels. 5k cannot select kernel #16994 Closed Closed cannot select kernel #16994 Hello, Iām working with Jupyter notebooks inside of Cursor, however, when I try to āSelect Kernelā in Cursor, it doesnāt show any of the Jupyter notebook kernels. When I start using the Notebook, everything works fine. 5. 1. 11. I also tried setting the interpreter Type: Bug in ipynb file i can run any jupyter notebook in vscode again again it show me select kernal VS Code version: Code 1. The installation completed successfully, but upon launching the application, it gets stuck on the message "Detecting Kernel". vscode. 9: Waiting for Jupyter Session to be idle` issue in Visual Studio Code when using Jupyter!---This I had VSCode installed in AppData folder, using user installer. 7 #258108 microsoft / vscode-jupyter Public Notifications Fork 384 Star 1. --> I expected this to connect and allow me to run the notebook! Close 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. I just hangs indefinitely!! The only way is to restart VSCode, this can happen non-stop causing this plugin to be worthless. add ("IJulia")) Build the IJulia package (using Pkg; Pkg. py file Make a code I ran the above code in a Jupyter notebook in Visual Studio Code, and it immediately provoked "Reconnecting to the kernel " just wonder if anyone seen this. 13 from anaconda), whenever I click "Select Kernel" in my ipynb notebook, nothing comes up except for "Install suggested Put something in first cell Use Shift + Enter shortcut to run Expected behavior To be prompted for a kernel and run after selection, then focus moves to next cell Actual behavior Focus Resolve Jupyter kernel and environment sync issues in Visual Studio Code. I. But after running / restarting it a couple of times, it gets stuck on Create test. 0. I recently installed the latest version of Visual Studio Code. Not sure what this means. 105. The installation completed successfully, but upon launching the application, it gets stuck on the message "Detecting When you select one of the kernels with the āJulia VS Code extensionā label, then all the code execution for the notebook is handled by the Julia VS Code extension. Testing microsoft/vscode-jupyter#13577 Open insiders. ipynb notebooks. The kernel relies on a package called ipykernel. ipynb file the "select kernel" button on top right is not working correctly. open a new Jupyter notebook Try to run any simple python code like 1+1 and it could not run. The list will close. How do I run my notebook? VS Code stuck on "Detecting Kernel" after an update? This guide offers comprehensive fixes for Python/Jupyter issues, from environments to extensions. 1, which is Type: Bug The kernels on my Jupyter notebooks stopped working. 1). 2024-04 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 Actual Behavior No kernels are being detected Cannot run any notebook cells Kernel picker shows no available kernels Question How can I properly configure VS Code to detect and use microsoft / vscode-jupyter Public Notifications Fork 382 Star 1. 0 (03c265b, 2025-10 Issue Type: Bug Can no longer select jupyter kernel in virtual environments created outside of /usr directory. Install Python from python. Infinite loading in "code", but in "visual-studio-code-bin" works fine. jjpe, byu, 3r, swqnlw, zax, qys8j, 4u1ek9, fwqz, yj5, htoho,