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claude-code - 💡(How to fix) Fix [BUG] Cowork VM boots successfully on Windows side but Linux guest hangs silently after first session - Snapdragon X ARM64 [1 comments, 2 participants]

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anthropics/claude-code#46726•Fetched 2026-04-12 13:34:39
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Error Message

Error Messages/Logs

Code Example

Hyper-V guest OS boot hangs silently on Snapdragon X after first session, possibly related to rootfs state or Hyper-V virtualization compatibility on this platform.
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Preflight Checklist

  • I have searched existing issues and this hasn't been reported yet
  • This is a single bug report (please file separate reports for different bugs)
  • I am using the latest version of Claude Code

What's Wrong?

Cowork connected and worked successfully once. Every subsequent attempt has the VM container starting successfully on the Windows side (HCS returns success, console pipe connects) but the Linux guest produces no output and coworkd log does not update. Results in 60 second timeout.

What Should Happen?

Cowork should launch.

Error Messages/Logs

Hyper-V guest OS boot hangs silently on Snapdragon X after first session, possibly related to rootfs state or Hyper-V virtualization compatibility on this platform.

Steps to Reproduce

Launch cowork

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

No response

Claude Code Version

1.1617.0.0 arm64

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

Title: Cowork VM boots successfully on Windows side but Linux guest hangs silently after first session - Snapdragon X ARM64 Environment:

Device: Snapdragon X X126100 (Qualcomm Oryon CPU) OS: Windows 11 Pro ARM64 Claude version: 1.1617.0.0 arm64

Behavior: Cowork connected and worked successfully once. Every subsequent attempt has the VM container starting successfully on the Windows side (HCS returns success, console pipe connects) but the Linux guest produces no output and coworkd log does not update. Results in 60 second timeout. Confirmed working:

HNS network cowork-vm-nat created, forwarding enabled CoworkVMService starts and runs HcsCreateComputeSystem and HcsStartComputeSystem both return hr=0x0 Console pipe connects successfully vmlinuz is valid ARM64 kernel (magic bytes 4D 5A 40 FA) rootfs.vhdx is intact (9.1 GB, decompressed from 2.2 GB zst) coworkd log shows successful connection on April 10 but nothing from April 11 attempts

Suspected cause: Hyper-V guest OS boot hangs silently on Snapdragon X after first session, possibly related to rootfs state or Hyper-V virtualization compatibility on this platform.

extent analysis

TL;DR

The issue can be potentially resolved by investigating and addressing the suspected cause of Hyper-V guest OS boot hangs silently on Snapdragon X after the first session, possibly related to rootfs state or Hyper-V virtualization compatibility.

Guidance

  • Verify the integrity of the rootfs.vhdx file to ensure it is not corrupted, as it is mentioned to be intact but its state after the first session could be a factor.
  • Check for any updates or patches related to Hyper-V virtualization on Windows 11 Pro ARM64 that might address compatibility issues with Snapdragon X.
  • Investigate the coworkd log for any patterns or clues that could indicate why it stops updating after the first successful connection.
  • Consider testing the setup on a different platform or with a different version of Claude Code to isolate if the issue is specific to the Snapdragon X or the current version of Claude Code.

Example

No specific code snippet can be provided without more details on the implementation, but checking the coworkd log for errors or patterns could involve commands like cat coworkd.log | grep "error" or similar, depending on the log format and content.

Notes

The issue seems to be highly specific to the hardware (Snapdragon X) and software (Windows 11 Pro ARM64, Claude Code version 1.1617.0.0 arm64) configuration. Without more information on the changes made between the last working version and the current version, or without direct access to the system for debugging, providing a precise fix is challenging.

Recommendation

Apply a workaround by investigating Hyper-V settings and compatibility with Snapdragon X, as upgrading to a fixed version is not explicitly mentioned as an option in the provided information. This approach allows for a more targeted attempt at resolving the issue without waiting for a potential update.

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#api#GPU compatibility#latency issue#model loading#dependency error

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