LMMS / LMMS/lmms

Carla can't load as an effect

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bug linux
Dominant language
C++
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Description

### System Information

Ubuntu 24 I think, on a phone on top of Termux

### LMMS Version(s)

Latest, I build from source

### Most Recent Working Version

_No response_

### Bug Summary

As the title says, Carla can't load as an effect
[https://media.discordapp.net/attachments/250805775646064641/1331606100490846312/Screenshot_20250122-134617.png?ex=67938bd2&is=67923a52&hm=c47667140543ab8be0551b38c245e3a789c2ef93fd8ba4e0058308a760642407&](url)

### Expected Behaviour

well, load, duh.

### Steps To Reproduce

Open LMMS, add an instrument, go in Effects and try to add Carla, either Patchbay or Rack, and you'll be greeted with a wide grey rectangle instead of the plugin UI

### Logs

Click to expand

  

### Screenshots / Minimum Reproducible Project

_No response_

### Please search the issue tracker for existing bug reports before submitting your own.

- [x] I have searched all existing issues and confirmed that this is not a duplicate.

Contributor guide

No contributing guide indexed for this repository

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the Carla Patchbay or Rack effect-loading steps on the reported Ubuntu-on-Termux setup using a source build of LMMS. Investigate the effect-loading path and capture the missing logs; done means Carla opens with its plugin UI instead of a wide grey rectangle.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp, linux
Domain
desktop
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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