Terminal Sandbox Issue Linux

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I can confirm this issue is still present after upgrading to the latest Cursor from APT (DEB install path).

Environment

  • OS: Ubuntu 24.04 LTS
  • Kernel: 6.17.0-19-generic
  • Install method: official APT/DEB
  • Cursor: upgraded via apt update && apt upgrade (latest available from Cursor repo)

Current behavior

After update, I still get:

Terminal sandbox could not start

And direct sandbox preflight still fails with:

Step 2.5/7 (loopback setup) failed: loopback: failed to look up lo interface

So the problem is reproducible on latest package, not fixed by updating.

Additional packaging issue observed

After following the suggested AppArmor package flow, APT ended up with duplicate source entries:

  • /etc/apt/sources.list.d/cursor-apparmor.sources
  • /etc/apt/sources.list.d/cursor.sources

This causes repeated configured multiple times warnings on every apt update.

Impact

This has become a recurring maintenance burden.

Request to Cursor team

Please provide:

  1. A tracked bug ID for this Linux sandbox regression.
  2. A known-good Cursor version for Ubuntu 24.04.
  3. Clear ETA for a real fix (not workaround-only guidance).
  4. A packaging fix to prevent duplicate APT source files.

References: