toonarmycaptain/dionysus

Bug : Tkinter filedialog.askopenfilename() crashes on Linux

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#819 opened on Oct 9, 2025

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Description

Bug Report: Tkinter filedialog.askopenfilename() crashes on Linux with [xcb] Unknown sequence number while appending request Summary

On Linux systems using X11, calling tkinter.filedialog.askopenfilename() causes an immediate process abort with the following XCB error: [xcb] Unknown sequence number while appending request [xcb] You called XInitThreads, this is not your fault [xcb] Aborting, sorry about that. python3: ../../src/xcb_io.c:157: append_pending_request: Assertion `!xcb_xlib_unknown_seq_number' failed. Aborted (core dumped)

Start app, create a class, enter a name....prompt to enter an image does not appear

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Research direction
Examine the XCB abort error in tkinter filedialog on Linux. Test with a minimal Tkinter app to isolate the issue. Check if XInitThreads is involved.
Tech stack
python
Domain
desktop
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
PythonTkinter
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
35