UI becomes unresponsive when opening workspace with Copilot installed #280253
Description
Type: Bug
When I open a certain workspace with the Copilot extension installed, VSCode becomes unresponsive. After a couple of minutes, it unfreezes and I see a UnresponsiveSampleError in logs, but the extension isn't active.
This issue began immediately after updating VSCode to the latest version, though I'm not sure it's related.
I've tried numerous things while debugging:
- Using the pre-release version of Copilot
- Disabling all extensions besides Copilot
- Clearing all sorts of caches/settings; I can't even recall exactly which
I eventually found that the problem only affects one specific workspace file. If I replace the workspace file's content with an empty JSON object, I still experience the freeze. If I copy-paste the workspace file and open it with a different file name, the freeze doesn't happen.
It seems like this has to do with some sort of workspace-related cache, but I can't figure out what.
I've attached the logs with the UnresponsiveSampleError. I also have a trace if necessary, but it's fairly large.
VS Code version: Code 1.106.3 (Universal) (bf9252a, 2025-11-25T22:28:18.024Z)
OS version: Darwin arm64 24.6.0
Modes:
Remote OS version: Linux x64 6.14.0-1017-aws
System Info
| Item | Value |
|---|---|
| CPUs | Apple M1 Max (10 x 2400) |
| GPU Status | 2d_canvas: enabled 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: enabled_on trees_in_viz: disabled_off video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off |
| Load (avg) | 3, 4, 4 |
| Memory (System) | 32.00GB (2.79GB free) |
| Process Argv | --file-uri vscode-remote://ssh-remote+devbox/home/ubuntu/co/backend/backend-combined.code-workspace --crash-reporter-id 5dd3cad6-e0e1-48d8-8f97-b79f50656217 |
| Screen Reader | no |
| VM | 0% |
| Item | Value |
|---|---|
| Remote | SSH: devbox |
| OS | Linux x64 6.14.0-1017-aws |
| CPUs | Intel(R) Xeon(R) Platinum 8375C CPU @ 2.90GHz (16 x 0) |
| Memory (System) | 61.78GB (56.88GB free) |
| VM | 0% |
Extensions (8)
| Extension | Author (truncated) | Version |
|---|---|---|
| remote-ssh | ms- | 0.120.0 |
| remote-ssh-edit | ms- | 0.87.0 |
| remote-wsl | ms- | 0.104.3 |
| vscode-remote-extensionpack | ms- | 0.26.0 |
| remote-explorer | ms- | 0.5.0 |
| remote-server | ms- | 1.5.3 |
| default-keys-windows | smc | 1.0.0 |
| copilot-chat | Git | 0.33.3 |
A/B Experiments
vsliv368cf:30146710
binariesv615:30325510
nativeloc1:31344060
dwcopilot:31170013
dwoutputs:31242946
copilot_t_ci:31333650
e5gg6876:31282496
pythonrdcb7:31342333
6518g693:31334701
aj953862:31281341
82j33506:31327384
nes-set-on:31340697
6abeh943:31336334
cloudbuttont:31379625
todos-1:31405332
v66_all_req:31402695
3efgi100_wstrepl:31403338
trigger-command-fix:31379601
auto_model_enabled:31396818
use-responses-api:31390855
defaultusage:31403421
je187915:31401257
ec5jj548:31422691
copilot-nes-oct-t:31418199
terminalsuggestenabled:31426255
cmp-ext-treat:31426748
cp_cls_c_966_ss:31426491
chatvisible:31426294
expandedtokens:31426297
c0683394:31419495
478ah919:31426797
7gj03587:31426750
fa76a614:31426783
5j92g670_sonnet:31426790