Cursor user input 'i' became 'I' (uppercase) in Ubuntu 24.04 LTS

[syscl]

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

If I typed in “i” (without quotes, lower case) in cursor, for example doing a search, or ask a question in conversation, the “i” will became uppercase I, this does not happen on macOS 26.2 but happens on both my ubuntu (hp c1030) or ubuntu running on proxmox.

Steps to Reproduce

Just install latest cursor on Ubuntu 24.04 LTS, and open any file, search and type in “i” you will notice i became upper case I, same as talking to agent

Expected Behavior

check the words all letter i became I

Screenshots / Screen Recordings

Operating System

Linux

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.2.20
VSCode Version: 1.105.1
Commit: b3573281c4775bfc6bba466bf6563d3d498d1070
Date: 2025-12-12T06:29:26.017Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Linux x64 6.14.0-37-generic

For AI issues: which model did you use?

no related to model

Additional Information

This bug seems happens since Dec 9th latest cursor and onward

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

[deanrie]

Hey, thanks for the report.

We need a quick diagnostic pass:

Critical - compare with VS Code:

• Install VS Code and check if the same issue occurs
• If VS Code is fine, it’s definitely a Cursor‑specific bug

Test without extensions:
cursor --disable-extensions

Does the issue persist?

Please clarify:

• Does it happen in editor files (any type: .txt, .py, .js)?
• Only in chat, or also in search?

If VS Code works fine but Cursor doesn’t, we’ll file a bug. Please share the results of these checks.