Skip to content

VS Code becomes unresponsive due to Markdown PDF extension causing editor freeze #425

@CodeThief831

Description

@CodeThief831

Type: Bug

  1. Install the Markdown PDF (yzane.markdown-pdf) extension in Visual Studio Code.

  2. Open any project or codebase (even non-Markdown projects).

  3. Continue normal development activities such as editing files, navigating code, or running tasks.

  4. After some time, VS Code becomes unresponsive and the system shows a prompt saying:
    “The program is not responding. Wait for the program to respond or close the program.”

Expected Result

VS Code should continue functioning normally without freezing.
The Markdown PDF extension should not interfere with normal development workflows when it is not actively being used.

Actual Result

VS Code becomes unresponsive and stops responding unexpectedly.
The system prompts the user to either:

Wait for the program to respond, or

Close and reopen the application

This interrupts ongoing development work and affects productivity, especially when working on large or complex projects.

Investigation Performed

To identify the cause, I performed extension bisecting and isolation testing:

Disabled all extensions in VS Code.

Re-enabled them individually to observe system behavior.

Repeated the process multiple times.

After several tests, the issue consistently occurred only when the Markdown PDF extension was enabled.

When the extension is disabled:

VS Code runs smoothly.

No freezing or “not responding” prompts appear.

When the extension is enabled:

VS Code occasionally freezes and becomes unresponsive.

Impact

This behavior significantly affects developers because:

The editor freezes during active development.

Users must wait for the program to respond or restart the application.

Development workflow gets interrupted, especially in complex coding environments.

Additional Notes

The issue seems to be related to background processing or extension host behavior triggered by the Markdown PDF extension. Further investigation may be required to determine whether it is related to resource usage, file watchers, or conversion processes.

Extension version: 1.5.0
VS Code version: Code 1.109.5 (072586267e68ece9a47aa43f8c108e0dcbf44622, 2026-02-19T19:43:32.382Z)
OS version: Windows_NT x64 10.0.19045
Modes:

System Info
Item Value
CPUs AMD Ryzen 5 2500U with Radeon Vega Mobile Gfx (8 x 1996)
GPU Status 2d_canvas: enabled
GPU0: VENDOR= 0x1002, DEVICE=0x15dd [AMD Radeon(TM) Vega 8 Graphics], DRIVER_VENDOR=AMD, DRIVER_VERSION=31.0.21923.1000 ACTIVE
GPU1: VENDOR= 0x1414, DEVICE=0x008c [Microsoft Basic Render Driver], DRIVER_VERSION=10.0.19041.5794
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: enabled
webgl: enabled
webgl2: enabled
webgpu: enabled
webnn: disabled_off
Load (avg) undefined
Memory (System) 6.91GB (1.15GB free)
Process Argv C:\Users\royal\OneDrive\Desktop\1 ctf\Razz Agent --crash-reporter-id 380a4637-36d6-4d5a-9469-d67df8e40e4d
Screen Reader no
VM 0%
A/B Experiments
vsliv368cf:30146710
binariesv615:30325510
nativeloc1:31344060
dwcopilot:31170013
dwoutputs:31242946
copilot_t_ci:31333650
e5gg6876:31282496
pythonrdcb7:31342333
6518g693:31463988
aj953862:31281341
6abeh943:31336334
envsactivate1:31464700
cloudbuttont:31379625
aihoversummaries_f:31469309
42190218_ostrepl:31403339
use-responses-api:31390855
je187915:31454425
ec5jj548:31422691
cp_cls_c_966_ss:31454199
4je02754:31466945
ge8j1254_inline_auto_hint_haiku:31427726
nes-autoexp-off:31446584
a5gib710:31434435
38bie571_auto:31429954
7a04d226_do_not_restore_last_panel_session:31438103
preserve_tokens:31444546
cp_cls_c_1081:31454833
ia-use-proxy-models-svc:31452481
core-renderer-profiling-on:31440367
a43f0576c:31442824
e9c30283:31461165
test_treatment2:31471001
nes-conv-2-3:31474331
control_6dc23131:31467998
idci7584:31464702
edit_mode_hidden:31461530
864ei723_large_tool_results_to_disk:31460878
showingstats:31471631
i54ji102:31458073
b1f5h706:31471673
nes-extended-on:31455476
chat:31457767
ah:31460422
jdddd261:31472041
cpptoolson-v2:31473885
thinking_c:31471065

Metadata

Metadata

Assignees

No one assigned

    Labels

    No labels
    No labels

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions