I also thought it was wine, but I wasn't sure. Thank you Erich for taking the time.
-- You received this bug notification because you are a member of Ubuntu Studio Bugs, which is subscribed to carla in Ubuntu. https://bugs.launchpad.net/bugs/1875641 Title: Wine32 VST Bridge plugins missing gui (Ubuntu Studio 20.04) Status in carla package in Ubuntu: Triaged Status in wine-development package in Ubuntu: Confirmed Status in carla source package in Focal: Triaged Status in wine-development source package in Focal: Confirmed Status in carla source package in Groovy: Triaged Status in wine-development source package in Groovy: Confirmed Bug description: Carla works very well with the Wine64 Bridge. Only the Wine32 starts the VST32 Plugins in a Window with a black screen with the NVIDIA- Meta-Driver-440. I've uninstalled the wine-development version 5.5 and installed the latest winehq-devel 5.7 from WineHQ and recompiled the Carla-Bridges my self. Now the Wine32 VST Plugins are working. Maybe it's a bug in the wine-development package or something missing in the carla package. --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu27 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: XFCE DistroRelease: Ubuntu 20.04 InstallationDate: Installed on 2020-04-25 (3 days ago) InstallationMedia: Ubuntu-Studio 20.04 LTS "Focal Fossa" - Release amd64 (20200423) NonfreeKernelModules: nvidia_modeset nvidia Package: carla 2.1-0ubuntu1 PackageArchitecture: amd64 ProcVersionSignature: Ubuntu 5.4.0-26.30-lowlatency 5.4.30 Tags: focal Uname: Linux 5.4.0-26-lowlatency x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm audio cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/carla/+bug/1875641/+subscriptions -- Mailing list: https://launchpad.net/~ubuntustudio-bugs Post to : ubuntustudio-bugs@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntustudio-bugs More help : https://help.launchpad.net/ListHelp