0009999: ZynAddSubFX Plugin GUI broken in Ardour

ID	Project	Category	View Status	Date Submitted	Last Update

0009999	ardour	bugs	public	2025-09-04 05:11	2025-09-04 14:51

Reporter	CostaAzul	Assigned To
Priority	normal	Severity	minor	Reproducibility	always
Status	new	Resolution	open
Platform	Ubuntu	OS	Linux	OS Version	(any)
Product Version	8.12

Summary	0009999: ZynAddSubFX Plugin GUI broken in Ardour
Description	Double clicking the ZynAddSubFX plugin in Ardour opens up a very broken GUI, but for some reason the GUI is fine when opening ZynAddSubFX as a standalone program. The plugin still produces audio, but the broken GUI makes it nearly impossible to configure.
Tags	ZynAddSubFX

CostaAzul 2025-09-04 05:11 reporter	Screenshot From 2025-09-03 21-59-16.png (427,046 bytes)

x42 2025-09-04 13:21 administrator ~0029420	It works fine here on debian (Xorg). Are you using XWayland on Ubuntu or Xorg? Could this perhaps be due to scaling? Do you have Ardour Prefs > Appearance > Ui/Font scaling set? if so Ardour also asks the plugin to scale.. zyn-a8.png (250,012 bytes) zyn-a8.png (250,012 bytes)

x42 2025-09-04 13:21 administrator ~0029421	PS. is this specific to zyn? Do other LV2 plugin UIs work?

CostaAzul 2025-09-04 14:51 reporter ~0029422	Okay, I switched to Xorg and now it works just fine. This was specific to just Zyn, all the other plugin UIs worked in both XWayland and Xorg. I tried changing the GUI scale in Ardour preferences, but that seemed to have no effect on the plugin scale.

Date Modified	Username	Field
2025-09-04 05:11	CostaAzul	New Issue
2025-09-04 05:11	CostaAzul	Tag Attached: ZynAddSubFX
2025-09-04 05:11	CostaAzul	File Added: Screenshot From 2025-09-03 21-59-16.png
2025-09-04 13:21	x42	Note Added: 0029420
2025-09-04 13:21	x42	File Added: zyn-a8.png
2025-09-04 13:21	x42	Note Added: 0029421
2025-09-04 14:51	CostaAzul	Note Added: 0029422