Carla window is black when loaded as a plugin

[suhr]

See falkTX/Carla#813.

cast @minijackson

[suhr]

How to reproduce:

• Load carla in a plugin host
• Try to open vst ui

Plugin hosts I tried: Helio Workstation, REAPER. To allow plugin hosts to find the plugin, symlink ~/.vst to ~/.nix-profile/lib/vst and install carla into the environment.

Traceback (most recent call last):
  File "/home/suhr/.vst/carla.vst/resources/carla-plugin-patchbay", line 22, in <module>
    from PyQt5.QtGui import QKeySequence, QMouseEvent
ModuleNotFoundError: No module named 'PyQt5'
waitForClientFirstMessage() - read returned 0

My custom carla package didn't have the problem with PyQt5 (though it had all other kinds of issues). But it also had the black window problem, so don't close this issue straight after fixing the problem with PyQt5.

[minijackson]

Sorry for the delay! The above PR should fix this issue. I've tested it using the LV2 plugin, but it should work the same for the VST plugin.

I'm not sure I understand why you want this issue to stay open though ^^

[suhr]

Can anyone merge #68795?

[nixos-discourse]

This issue has been mentioned on NixOS Discourse. There might be relevant details there:

https://discourse.nixos.org/t/running-pyqt5-app-modulenotfounderror-no-module-named-pyqt5/16072/1