Recent changes to 67: Problems during playback on 64-bit OpenJDK 8 on Linux

#67 Problems during playback on 64-bit OpenJDK 8 on Linux

Nick Athie — Wed, 26 Jul 2017 02:35:26 -0000

Ubuntu 16.04.2 LTS (xenial)

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.2 LTS
Release: 16.04
Codename: xenial

$ uname -a
Linux nicks 4.4.0-83-generic #106-Ubuntu SMP Mon Jun 26 17:54:43 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

#67 Problems during playback on 64-bit OpenJDK 8 on Linux

Robert Keller — Tue, 25 Jul 2017 06:14:18 -0000

One of our students has been using it on Ubuntu all summer and has not experienced this problem. Which version of Linux are you using?

#67 Problems during playback on 64-bit OpenJDK 8 on Linux

Nick Athie — Tue, 18 Jul 2017 01:58:42 -0000

Update: I get the same behavior from Oracle JRE 1.8.0_131.

Problems during playback on 64-bit OpenJDK 8 on Linux

Nick Athie — Tue, 18 Jul 2017 00:41:12 -0000

While Impro-Visor 9.1 is playing, if I move the mouse at all, the playback pauses for a little while. If I move the mouse faster, it even loses timing.

If I set the following in the start script:
INSTALL4J_ADD_VM_PARAMS=-Dsun.java2d.opengl=true

to enable Java to use OpenGL for rendering, the timing is much better. You might want to enable this by default, or provide a menu option to use the OpenGL renderer (which would require a restart of Impro-Visor).

However, even with OpenGL rendering, the MIDI playback will occasionally pause.