Received A Message From A Compositor With A Null Sender Id

Mar 10, 2025 by ADMIN 59 views

Introduction

In this article, we will be discussing an issue that occurred with the compositor, where a message was received with a null sender ID. This issue was encountered while using the Swww compositor, which is a Wayland compositor written in Rust. The issue was reported on a system running NixOS 25.05 (Warbler) with an AMD Ryzen 9 9900X CPU and an RX 7900 XTX GPU.

System Information

The system information for the machine where the issue occurred is as follows:

OS: NixOS 25.05 (Warbler)
Kernel: 6.13.5
WM: Hyprland (0.47.0) at commit 7753e8ea686ba0aeaa825502f27e5b3f813faade
CPU: AMD Ryzen 9 9900X
GPU: RX 7900 XTX

Logs

The logs for the issue are as follows:

         0ms [INFO]  Selected wl_shm format: Xbgr
       434ms [INFO]  BumpPool with: 1 buffers. Size: 8100Kb
       438ms [INFO]  BumpPool with: 1 buffers. Size: 8100Kb
       441ms [INFO]  BumpPool with: 1 buffers. Size: 8100Kb
       631ms [INFO]  BumpPool with: 1 buffers. Size: 14400Kb
     35142ms [INFO]  BumpPool with: 2 buffers. Size: 28800Kb
     35160ms [INFO]  BumpPool with: 2 buffers. Size: 16200Kb
     35163ms [INFO]  BumpPool with: 2 buffers. Size: 16200Kb
     35166ms [INFO]  BumpPool with: 2 buffers. Size: 16200Kb
    115047ms [INFO]  BumpPool with: 3 buffers. Size: 24300Kb
    115049ms [INFO]  BumpPool with: 3 buffers. Size: 24300Kb
    115051ms [INFO]  BumpPool with: 3 buffers. Size: 24300Kb
    115530ms [INFO]  BumpPool with: 4 buffers. Size: 32400Kb
    115535ms [INFO]  BumpPool with: 4 buffers. Size: 32400Kb
    115538ms [INFO]  BumpPool with: 4 buffers. Size: 32400Kb
    115540ms [INFO]  BumpPool with: 3 buffers. Size: 43200Kb
    115548ms [INFO]  BumpPool with: 5 buffers. Size: 40500Kb
    115552ms [INFO]  BumpPool with: 5 buffers. Size: 40500Kb
    115555ms [INFO]  BumpPool with: 5 buffers. Size: 40500Kb
  65623249ms [INFO]  BumpPool with: 6 buffers. Size: 48600Kb
  65623252ms [INFO]  BumpPool with: 6 buffers. Size: 48600Kb
  65623254ms [INFO]  BumpPool with: 6 buffers. Size: 48600Kb
  65623319ms [INFO]  BumpPool with: 7 buffers. Size: 56700Kb
  65623321ms [INFO]  BumpPool with: 7 buffers. Size: 56700Kb
  65623323ms [INFO]  BumpPool with: 7 buffers. Size: 56700Kb
  65623325ms [INFO]  BumpPool with: 4 buffers. Size: 57600Kb
  65623616ms [INFO]  BumpPool with: 5 buffers. Size: 72000Kb
  65623620ms [INFO]  BumpPool with: 8 buffers. Size: 64800Kb
  65623622ms [INFO]  BumpPool with: 8 buffers. Size: 64800Kb
  65623624ms [INFO]  BumpPool with: 8 buffers. Size: 64800Kb
thread 'main' panicked at daemon/src/wayland/wire.rs:70:18:
received a message from compositor with a null sender id
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
  65623639ms [ERROR] error destroying wp_viewport: Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }
  65623639ms [ERROR] error destroying wp_fractional_scale_v1: Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }
  65623639ms [ERROR] error destroying zwlr_layer_surface_v1: Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }
  65623639ms [ERROR] failed to destroy wl_buffer: Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }
  65623639ms [ERROR] failed to destroy wl_buffer: Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }
  65623639ms [ERROR] failed to destroy wl_buffer: Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }
  65623639ms [ERROR] failed to destroy wl_buffer: Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }
  65623639ms [ERROR] failed to destroy wl_buffer: Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }
  65623639ms [ERROR] failed to destroy wl_buffer: Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }
  65623639ms [ERROR] failed to destroy wl_shm_pool: Broken pipe (os error 32)
  65623643ms [ERROR] error destroying wp_viewport: Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }
  65623644ms [ERROR] error destroying wp_fractional_scale_v1: Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }
  65623644ms [ERROR] error destroying zwlr_layer_surface_v1: Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }
  65623644ms [ERROR] failed to destroy wl_buffer: Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }
  65623644ms [ERROR] failed to destroy wl_buffer: Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }
  65623644ms [ERROR] failed to destroy wl_buffer: Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }
  65623644ms [ERROR] failed to destroy wl_buffer: Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }
  65623644ms [ERROR] failed to destroy wl_buffer: Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }
  65623644ms [ERROR] failed to destroy wl_buffer: Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }
  65623644ms [ERROR] failed to destroy wl_buffer: Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }
  65623644ms [ERROR] failed to destroy wl_buffer: Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }
  65623644ms [ERROR] failed to destroy wl_shm_pool: Broken pipe (os error 32)
  65623647ms [ERROR] error destroying wp_viewport: Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }
  65623647ms [ERROR] error destroying wp_fractional_scale_v1: Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }
  65623647ms [ERROR] error destroying zwlr_layer_surface_v1: Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }
  65623647ms [ERROR] failed to destroy wl_buffer: Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }
  65623647ms [ERROR] failed to destroy wl_buffer: Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }
  65623647ms [ERROR] failed to destroy wl_buffer: Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }
  65623647ms [ERROR] failed to destroy wl_buffer: Os { code: 32, kind: BrokenPipe, message<br/>
**Q&A: Received a Message from a Compositor with a Null Sender ID**
====================================================================

**Q: What is a compositor and how does it work?**
------------------------------------------------

A: A compositor is a software component that manages the graphical user interface (GUI) of a system. It is responsible for rendering the GUI, handling user input, and managing the display of windows and other graphical elements. In the context of Wayland, the compositor is a separate process that runs on the system and communicates with the client applications to manage the GUI.

**Q: What is a null sender ID and how does it affect the compositor?**
----------------------------------------------------------------

A: A null sender ID is a value that is sent by the compositor to indicate that the message is not coming from a specific client application. In the case of the issue reported, the null sender ID was received by the compositor, which caused it to panic and crash.

**Q: What are the possible causes of a null sender ID in the compositor?**
-------------------------------------------------------------------

A: There are several possible causes of a null sender ID in the compositor, including:

* **Client application crash**: If a client application crashes, it may send a null sender ID to the compositor, which can cause the compositor to panic and crash.
* **Compositor bug**: There may be a bug in the compositor that causes it to send a null sender ID to itself, which can cause the compositor to crash.
* **Wayland protocol issue**: There may be an issue with the Wayland protocol that causes the compositor to receive a null sender ID, which can cause the compositor to crash.

**Q: How can I troubleshoot the issue with the compositor?**
---------------------------------------------------------

A: To troubleshoot the issue with the compositor, you can try the following steps:

* **Check the system logs**: Check the system logs to see if there are any error messages related to the compositor.
* **Run the compositor in debug mode**: Run the compositor in debug mode to see if it provides any additional information about the issue.
* **Check the client application logs**: Check the logs of the client application to see if it is sending any error messages related to the compositor.
* **Try to reproduce the issue**: Try to reproduce the issue by running the client application and the compositor in a controlled environment.

**Q: How can I prevent the compositor from crashing due to a null sender ID?**
-------------------------------------------------------------------------

A: To prevent the compositor from crashing due to a null sender ID, you can try the following steps:

* **Implement error handling**: Implement error handling in the compositor to catch and handle null sender IDs.
* **Use a more robust Wayland protocol**: Use a more robust Wayland protocol that is less prone to errors and crashes.
* **Use a different compositor**: Use a different compositor that is less prone to errors and crashes.

**Q: What are the consequences of a compositor crash?**
---------------------------------------------------

A: A compositor crash can have several consequences, including:

* **Loss of GUI functionality**: The GUI may become unresponsive or crash, making it difficult to use the system.
* **Data loss**: If the compositor is responsible for managing data, a crash may result in data loss.
* **System instability**: A compositor crash can cause the system to become unstable, leading to other issues and crashes.

**Q: How can I recover from a compositor crash?**
------------------------------------------------

A: To recover from a compositor crash, you can try the following steps:

* **Restart the compositor**: Restart the compositor to see if it resolves the issue.
* **Check the system logs**: Check the system logs to see if there are any error messages related to the compositor.
* **Run the compositor in debug mode**: Run the compositor in debug mode to see if it provides any additional information about the issue.
* **Try to reproduce the issue**: Try to reproduce the issue by running the client application and the compositor in a controlled environment.