** Changed in: lilv (Ubuntu Focal)
Assignee: Erich Eickmeyer (eeickmeyer) => (unassigned)
** Changed in: lilv (Ubuntu Focal)
Status: In Progress => Confirmed
--
You received this bug notification because you are a member of Ubuntu
Studio Bugs, which is subscribed to ardour in Ubuntu.
Matching subscriptions: ubuntustudio-bugs: ardour
https://bugs.launchpad.net/bugs/1877806
Title:
[SRU] ardour crashes when saving lv2 plugin preset - bug discovered in
lilv
Status in ardour package in Ubuntu:
Triaged
Status in lilv package in Ubuntu:
Fix Released
Status in ardour source package in Focal:
Triaged
Status in lilv source package in Focal:
Confirmed
Status in lilv source package in Groovy:
Fix Released
Bug description:
[Impact]
* Users of Ardour who wish to use LV2 audio plugins and make settings
presets are running into an issue where they are unable to save changes
to their presets. Attempts simply crash the application.
* This has been only been observed in Ubuntu 20.04 LTS. Attempts to
reproduce the behavior on 18.04, 19.10, and Groovy Gorilla proved
fruitless.
* Upon investigation, the bug was a regression in lilv 0.24.6 which was
corrected in 0.24.8 per https://github.com/lv2/lilv/issues/32 and its
attached commit.
[Test Case]
* In Ardour, start a new project, go to the Mixer view.
* Add a track to the project
* Add any LV2 plugin to the track
* Open the LV2 plugin interface via a double-click on the plugin
* Save a "New" preset, use any name.
* Make a change to the plugin state (any parameter), click "Save".
Ardour will crash.
[Regression Potential]
* This library (lilv) affects LV2 plugins and only LV2 plugins. Version
0.24.8 contains a number of bugfixes to enhance the stability of LV2
plugins, including the bugfix mentioned.
* Even though this version contains a number of bug fixes, there is always
potential for some regression in LV2 plugins to occur, such as
misbehavior or other regressions similar to this particular bug.
[Other Info]
* The diff in this case is quite large due to the number of bugs fixed.
While it is possible for a simple cherry pick of the commit in question,
I believe there is an even greater risk of regression or bugs appearing
if the full bugfix release is not used.
* The full bugfix release (0.24.8) fixes many bugs and does not contain
any new features as far as I can tell.
Original bug follows:
The few lv2 plugins I have tried all crash ardour when I click on
"save" to save the preset. Clicking Add to create a new plugin doesn't
crash, but it also does not save the preset. If you load a plugin
preset already created and then click save, you end up wiping out the
contents of the preset direcoty in ~/.lv2. The .ttl files are deleted
and you end up with an empty directoy. The only thing printed on the
console when this happens is this:
CALF DEBUG: instance 0x55c00d102860 data 0x55c01ca1cf10
CALF DEBUG: calf 0x7f8d31f7b0f0 cpi 0x7f8d31783ca0
Segmentation fault (core dumped)
AFAIK, teh preset add and save functions work for ladspa plugins.
-Don
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ardour 1:5.12.0-3ubuntu4
ProcVersionSignature: Ubuntu 5.4.0-29.33-lowlatency 5.4.30
Uname: Linux 5.4.0-29-lowlatency x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: XFCE
Date: Sat May 9 21:39:09 2020
InstallationDate: Installed on 2020-04-26 (13 days ago)
InstallationMedia: Ubuntu-Studio 20.04 LTS "Focal Fossa" - Release amd64
(20200423)
SourcePackage: ardour
UpgradeStatus: No upgrade log present (probably fresh install)
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/ardour/+bug/1877806/+subscriptions
--
Mailing list: https://launchpad.net/~ubuntustudio-bugs
Post to : ubuntustudio-bugs@lists.launchpad.net
Unsubscribe : https://launchpad.net/~ubuntustudio-bugs
More help : https://help.launchpad.net/ListHelp
