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Send line to terminal does nothing after sleep or terminal crash #26044
Description
Type: Bug
Behaviour
Send line to terminal fails to send after some time of working. This is easiest to trigger when waking from a sleep, but also happens if the terminal was killed.
Restarting VSCode & Python Extensions doesn't fix it. I've also tried turning on / off Python extension but this doesn't always seem to fix it either.
The sendline is only broken for that project. Opening another different project where the hang/bug has happened and send line will work correctly.
Full computer restart always fixes it.
Steps to reproduce:
- Innactivity seems to be the most consistent way this happens, I believe sleep.
Diagnostic data
Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)
XXX
Extension version: 2026.5.2026070801
VS Code version: Code 1.129.1 (8a7abeba6e03ea3af87bfbce9a1b7e48fed567b8, 2026-07-17T15:35:09Z)
OS version: Linux x64 7.0.0-27-generic
Modes:
- Python version (& distribution if applicable, e.g. Anaconda): 3.12.13.final.0
- Type of virtual environment used (e.g. conda, venv, virtualenv, etc.): System
- Value of the
python.languageServersetting: Default
User Settings
languageServer: "Pylance"
Installed Extensions
| Extension Name | Extension Id | Version |
|---|---|---|
| black-formatter | ms- | 2026.6.0 |
| copilot-chat | Git | 0.57.0 |
| debugpy | ms- | 2026.6.0 |
| even-better-toml | tam | 0.21.2 |
| github-vscode-theme | Git | 6.3.5 |
| js-debug | ms- | 1.117.0 |
| js-debug-companion | ms- | 1.1.3 |
| jsts-chat-features | Typ | 0.0.4 |
| python | ms- | 2026.5.2026070801 |
| svelte-vscode | sve | 110.3.0 |
| vim | vsc | 1.32.4 |
| vscode-js-profile-table | ms- | 1.0.10 |
| vscode-pylance | ms- | 2026.2.1 |
| vscode-python-envs | ms- | 1.36.0 |
System Info
| Item | Value |
|---|---|
| CPUs | 11th Gen Intel(R) Core(TM) i7-11800H @ 2.30GHz (16 x 4150) |
| GPU Status | 2d_canvas: enabled GPU0: VENDOR= 0x10de, DEVICE=0x25a0, DRIVER_VENDOR=Mesa, DRIVER_VERSION=26.0.3 GPU1: VENDOR= 0x8086, DEVICE=0x9a60, DRIVER_VENDOR=Mesa, DRIVER_VERSION=26.0.3 ACTIVE Machine model name: Machine model version: direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_graphite: disabled_off trees_in_viz: disabled_off video_decode: enabled video_encode: disabled_software vulkan: disabled_off webgl: enabled webgpu: enabled webgpu_on_vk_via_gl_interop: enabled webnn: disabled_off |
| Load (avg) | 1, 1, 1 |
| Memory (System) | 61.27GB (49.42GB free) |
| Process Argv | --crash-reporter-id 0f47ba33-9d7e-4297-8478-a40a8b196674 |
| Screen Reader | no |
| VM | 0% |
| DESKTOP_SESSION | ubuntu |
| XDG_CURRENT_DESKTOP | ubuntu:GNOME |
| XDG_SESSION_DESKTOP | ubuntu |
| XDG_SESSION_TYPE | wayland |
A/B Experiments
vsliv368:30146709
binariesv615:30325510
nativeloc1:31344060
dwcopilot:31170013
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pythonrdcb7:31342333
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hmra_i5g22:31518061
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jbcp_cls_pctr_t:31531130
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ahp-both-windows:31552051
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allow-none:31552288
6i51c363:31551401
Activity
eleanorjboyd commentedon Sep 23, 2026
🤖 Thanks for the report. The current code resets its cached terminal and REPL state when VS Code reports that a terminal closed, so we need a little more information to identify what remains stale here. Please confirm this on the latest Python extension and provide exact steps plus trace-level output from the Python, Terminal, and Pty Host output channels after the failure; also let us know whether the terminal remains visible, whether its shell process has exited, and whether manually closing that terminal causes the next Shift+Enter to create a working one. Issues marked
info-neededautomatically close after 30 days without a reply.github-actions commentedon Oct 24, 2026
Hey Anthony Kim (@anthonykim1), this issue might need further attention.
James O'Claire (@ddxv), you can help us out by closing this issue if the problem no longer exists, or adding more information.
ddxv commentedon Nov 11, 2026
Hello, this problem is still happening on computer sleeps / after long periods of time with the latest versions of vscode-python and vscode.
When it triggers any amount of closing / opening new shells does not fix the issue. The shells look fine, pressing Send Line (Ctrl Enter) will open a new interpreter if one does not exist yet, and that interpreter works fine, just the lines seem to never be sent. I also can sometimes get it to work by switching several times the vscode python extension from Stable -> Pre-Release and back.
But what you said made me realize I should actually be clearing the cache. This time I tried "Python: Clear Cache and Reload Window" and this immediately fixed my issue!
I don't have the traces from when this happens, and given that it seems very unique to me (no other people have joined this issue), I will close the issue for now.