[Ardour-Users] A4.4: Critical bug using calf's lv2

Damien Delpiroux xzurukneg at free.fr
Tue Oct 27 07:52:38 PDT 2015

Hi all.

I use kxstudio12.04 with calf's LV2 for many  years, with ardour 2,3
(+/- git), 4, and made my workflow with.
I've worked with this setup using ardour3-git (so it was ardour4 in
fact) for hours without problem.

But now I can't continue like this because I got critical bugs when I
use calf's LV2 (gate and  compressor for sure).
Generally, ardour4.4 is slower and not reactive as I (well) know since I
use plug-in (latency to open plugin-UI, to play after moving play head,
when reach end of loop).
The bug is really critical because: my system freeze!
That begin by very big latency between sound and played position showed
in editor (the play head don't go back to the begin of the loop when the
sound does), and go badder to critical bug.
The first time, the system freeze, not tty (!), alt-gr+kill+imp  (kill x
server) don't work, and after15min I finally get the login window (same
as when you boot), and still not tty!
After that, I see something strange in another terminal (for a music
player) about "gstreamer pluging scan errors".

After reboot (and update), I've reproduce the bug, also with bigger
buffer value in jack. Simply loop region and pay with calf's gate or
I've don't understand the "gnu compiler 5 thing", but I've try also with
Sunday nightly build, with same result.

I'll try to make a backtrace.



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