[LV2] Widget-less UI not working

Stefan Riha hoitaus at gmail.com
Thu Jul 7 20:14:23 PDT 2016

First off: it's very useful, thanks!

At the time I started the thread, I was using jalv 1.4.6, which is the
current version in the Arch Linux repos (and also listed as the latest
version on https://drobilla.net/software/jalv/ ). Never considered checking
out the development version before.

Output of jalv --help in version 1.4.6 lists:


Unknown option --help
Usage: /usr/bin/jalv [OPTION...] PLUGIN_URI
Run an LV2 plugin as a Jack application.
  -h           Display this help and exit
  -p           Print control output changes to stdout
  -c SYM=VAL   Set control value (e.g. "vol=1.4")
  -u UUID      UUID for Jack session restoration
  -l DIR       Load state from save directory
  -d DIR       Dump plugin <=> UI communication
  -b SIZE      Buffer size for plugin <=> UI communication


Regards, Stefan

On Fri, Jul 8, 2016 at 8:49 AM, David Robillard <d at drobilla.net> wrote:

> On Sat, 2016-05-28 at 11:10 +0200, Hanspeter Portner wrote:
> > On 28.05.2016 01:27, Stefan Riha wrote:
> > > I had time now to try it. I'm not sure if I understood this correctly,
> but ui:idleInterface and ui:showInterface don't
> > > seem to solve my problem. Jalv and Ardour don't even call
> extension_data(). They break before that, due to the invalid
> > > widget pointer they get from calling instantiate().
> >
> > Ah, I forgot to tell that not all hosts support ui:showInterface, yet.
> e.g. Ardour does not.
> > And jalv needs to be called with a special (undocumented) flag (-s), to
> run in the proper state.
> Undocumented how?
> Seems to be in jalv --help and jalv(1) from where I'm standing...
> --
> dr
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