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Zyn-Fusion's GUI is black when the LV2 version is opened in Qtractor

Open maxigaz opened this issue 3 years ago • 3 comments

I've reported this issue to Zyn-Fusion's issue tracker here. It's not clear what is causing it and I can't find any error messages from Qtractor's terminal output or log file that could help the developer find the right solution.

I'm posting this here as well in case you happen to have any insights that could help us, @rncbc. (Either about the bug itself, or how to increase the details of the outputs/logs.) The details are copied verbatim below.

The GUI of Zyn-Fusion is completely black if I open it in Qtractor.

This happens with the following software setup:

  • Arch Linux + i3-gaps
  • LV2 development version of Zyn-Fusion 3.0.7, compiled and installed through these scripts
  • Qtractor 0.9.25.r7.ga2bad068d, installed through the AUR package qtractor-git, and 0.9.26, installed through the official Arch package qtractor

The issue happens even though I made sure to run install-linux.sh, as it was suggested in the README.

The issue doesn't happen with the following versions:

  • VST dev version run in Qtractor
  • LV2 dev version run in Ardour
  • standalone dev version
  • v3.0.6 (installed from the Arch repos as zynaddsubfx.

maxigaz avatar May 28 '22 19:05 maxigaz

sorry I cannot help much, the standard old (non-Fusion) ZynAddSubFX LV2 UI seems to show and work fine though

rncbc avatar May 28 '22 21:05 rncbc

just compiled zyn-fusion, following all instructions as in the scripts above, and... no black window whatsoever (up to date openSUSE TW, kde_wayland).

rncbc avatar May 30 '22 13:05 rncbc

Thank you for taking the time to test it and share your findings!

I installed the development version of Zyn-Fusion in a systemd-nspawn container running inside a libvirt-qemu VM (so that it wouldn't replace the released version on my physical machine or the VM itself). Both the container and the VM are running Arch Linux with X.org, and the windows are managed by i3-gaps installed on the VM.

I'm not ruling out the possibility that this testing environment might be the cause, but I still wonder why I have a black window only in LV2 Zyn-Fusion + Qtractor and not with other versions/combinations.

(I've just tried a few LV2 plugins from the distrho-ports package, including Vitalium and Dexed, and they are all shown correctly in Qtractor.)

maxigaz avatar May 31 '22 09:05 maxigaz