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Plugins not showing up and grayed out Plugins

I have built Qtractor with VST support.
Now I have set the path for VST plugins to "/usr/lib/vst" and LV2 Presets Directory to "/usr/lib/lv2". It doesn't display whether the VST nor the LV2 plugins even after a restart of the program.
It does recognize my LADSPA plugins but these are all grayed out.

What can I do to make the plugins show up and add LADSPA plugins?

rncbc's picture

you don't have to set those plugins directories explicitlly, because in fact they are already the default.

besides, the lv2 preset directory should one you have enough write privileges as a regular user (default is ~/.lv2, so you rather leave it blank)

otoh. which LADSPA plugins are yours? plugin entries are grayed when whatever their input/output ports layout can't match the track or bus where they are about to be inserted.

please provide a screenshot of the plugin selection list and the about box for some further evidence.

Aah, I haven't set the track to MIDI so they were grayed out.

Okay now I haven't set the directories and the lv2 plugins are both in "/usr/lib/lv2" and in "~/.lv2" and they still don't appear. These are the default plugins that came with the install.

What is the default VST-directory? Is it "~/.vst" or "/usr/lib/vst" or anything other?

I was blocked because of reffering to an image from an image uploader. What should I do?

I guess the plugin selection screen reffered to the grayed out LADSPA plugins. If not, don't hesitate to ask me again for a screen.

rncbc's picture

the lv2 plugins are both in "/usr/lib/lv2" and in "~/.lv2" and they still don't appear. These are the default plugins that came with the install.

they should appear as soon you select "LV2" plugin type on the plugin selection dialog; also make sure the search phrase is empty (click on the [X] on the left).

also, from a command line console terminal, enter `lv2ls` and see if anything gets actually listed.

as last resort, try to rebuild the whole thing now with debug print outs (./configure --enable-debug) and watch for standard output console printouts (better run in from a console terminal for that matter).


I've entered lv2ls in the terminal and nothing comes.

Hmm when configuring it prints out:
OSC service support (liblo) . . . . . . . . . . .: no (I'm aware of that as I don't need it yet)

but maybe it it this:
Non Session Management (NSM) support . . . . . . .: no

X11 Unique/Single instance . . . . . . . . . . . .: no
VeSTige header support . . . . . . . . . . . . . .: no

Let me know when that is not the problem meanwhile I build it again with debug options.

rncbc's picture

I've entered lv2ls in the terminal and nothing comes.

if lv2ls can't find any plugins then you haven't any installed perhaps. or at least not under the regular default search path (which should be something like "~/.lv2:/usr/local/lib/lv2:/usr/lib/lv2" ...)

and what about when you run a debug enabled build, what is spitted out when you try to list lv2 plugins from the selection dialog? (nb. output appears in stdout, on terminal console).


I was missing the "lv2ls"-library. When I now enter it still nothing comes. (But at least no message I should install it :P) I have copied the lv2's to all three paths.

Sorry, where is qtractor installed? I can't find it under /opt and other places. I want to remove it so I can run the debug build.

rncbc's picture

you can run the debug build right after the `make` step as `src/qtractor`, no need to `make install`.


Hmm, there appears no terminal on shutdown. What do I have to do to make a debug build? I have only typed in "./configure --enable-debug" and then "make".

rncbc's picture

can you more specific what doesn't appear in your case?

if your checking out from svn trunk the steps the build and run are:

make -f Makefile.svn
./configure --enable-debug

then you can run it immediately with


if instead you're makeing it from a release or snapshot tarball then you can skip the first step above.


Okay now I know what you mean.

Here is the output:
void DBusMenuExporterPrivate::addAction(QAction*, int): Already tracking action "" under id 3
void DBusMenuExporterPrivate::addAction(QAction*, int): Already tracking action "" under id 4
qtractorPluginPath[0x7fff97ac04b0]::open() paths="/home/temrix/.lv2:/usr/local/lib64/lv2:/usr/lib64/lv2:/usr/local/lib/lv2:/usr/lib/lv2" typeHint=4
Cannot connect to server socket err = Datei oder Verzeichnis nicht gefunden
Cannot connect to server request channel
qtractorPluginPath[0x993a20]::open() paths="/home/temrix/.lv2:/usr/local/lib64/lv2:/usr/lib64/lv2:/usr/local/lib/lv2:/usr/lib/lv2" typeHint=4
qtractorPluginPath[0x993a20]::open() paths="/home/temrix/.vst:/usr/local/lib64/vst:/usr/lib64/vst:/usr/local/lib/vst:/usr/lib/vst" typeHint=3
qtractorPluginPath[0x993a20]::open() paths="/home/temrix/.lv2:/usr/local/lib64/lv2:/usr/lib64/lv2:/usr/local/lib/lv2:/usr/lib/lv2" typeHint=4

"Datei oder Verzeichnis nicht gefunden" means "File or folder not found"


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