JavaFX on Mac OS X and Linux needs to enable 'iglx'

[kasemir]

When using "ssh -Y" to log into a Linux computer, then running css and opening anything with JavaFX in it, css crashes with an error message mentioning "No matching fbConfigs or visuals found. Failed to load driver: swrast"

The problem is in the OpenGL support of XQuartz 2.7.9.
Running glxinfo in the remote Linux session will also report an error.

Fix: Downgrade to XQuarz 2.7.8 (https://www.xquartz.org/releases/XQuartz-2.7.8.html)
The XQuartz 2.7.10pre fails as well.

Related to #1816?

[kasemir]

Klemen reports that XQuartz 2.7.10 (without "-pre") works, no more crashes when opening JFX-based panes in CS-Studio.

[kasemir]

My Mac wanted to update to XQuartz 2.7.10 (xorg-server 1.18.4).
That's still with OS X Yosemite 10.10.5, i.e. not the latest base OS.

After the update, glxinfo and any JavaFX based tools would still crash with

libGL error: No matching fbConfigs or visuals found
libGL error: failed to load driver: swrast

Based on https://bugs.freedesktop.org/show_bug.cgi?id=96260 I then issued this command:

defaults write org.macosforge.xquartz.X11 enable_iglx -bool true

and now glxinfo and JavaFX based UIs work fine via an ssh connection to Linux.

Not sure if the 2.7.10 update is essential, of if just the 'defaults' setting is the key.

[kasemir]

Should not have said "JavaFX based UIs work fine via an ssh connection to Linux", because the performance is bad.
When the Eclipse UI responsiveness monitoring is enabled, there will be frequent UI freeze warnings with stack traces in GDK pixbuf native code whenever the FXCanvas renders itself.

What helped in one case is adjustments to the ssh settings by putting this into .ssh/config:

Compression yes
Ciphers blowfish-cbc,arcfour

[kasemir]

Ubuntu Linux can have a similar problem of glx not being enabled. Again glxgears and glxinfo will indicate a problem.

To enable GLX, add this to /etc/lightdm/lightdm.conf.d/confmrr.conf:

[SeatDefaults]
xserver-command=X +iglx

See also http://askubuntu.com/questions/745135/how-to-enable-indirect-glx-contexts-iglx-in-ubuntu-14-04-lts-with-nvidia-gfx

Another Ubuntu user enabled IGLX in file /usr/share/lightdm/lightdm.conf.d/50-xserver-command.conf.