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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
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dwcopilot:31170013
dwoutputs:31242946
copilot_t_ci:31333650
e5gg6876:31282496
pythonrdcb7:31342333
6518g693:31463988
aj953862:31281341
63221493:31336333
envsactivate1:31551504
cloudbuttont:31379625
3efgi100_wstrepl:31403338
55ia6109:31457054
ddidt:31399633
ec5jj548:31422691
cp_cls_t_966_ss:31526232
4je02754:31466945
8hhj4413:31478653
38bie571_auto:31426784
cp_cls_c_1081:31454833
conptydll_true:31498968
e9c30283:31461165
test_treatment2:31471001
c9b86496:31447327
capico_a_098a3278:31551523
idci7584:31464702
e3e4d672:31494082
ei9d7968:31496641
chat:31457767
8hig5102:31480529
89g7j272:31518289
7e187181:31503455
i2gc6536:31499202
52612955:31516516
ghj88844:31499326
23c7c724:31520045
ddid_t:31478206
hmra_i5g22:31518061
ie3bb177:31543534
7df3h592:31512476
cp_cls_t_1082:31535311
logging_enabled_new:31498466
j0d79568:31499440
jb_cp_cls_t_632:31543129
852d2892:31506239
56dj4588:31512888
32d76977:31512328
ha629193:31508444
cdk-lw-on:31524445
f9bf7985:31543584
jh5f2457_c:31540921
41836166:31537719
jbcp_cls_pctr_t:31531130
61138546:31518536
cp_intellij_t_nes:31548657
jf4hg949:31526829
nes-curr-leftover-1500:31538366
ahp-both-windows:31552051
h561g132:31533256
sessions_5:31532894
ihg5j128:31534457
f412h606:31551416
7g2b5551:31542111
sandbox-ui-on-2:31543161
nes-ex-cf-euporie-03:31542868
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.