Phoenicis crashes when running from a Wayland session

[ThanosApostolou]

Expected behavior

Program should run normally on a Gnome Wayland session (probably using xwayland).

Actual behavior

Running phoenicis crashes (core dumped) with output:

(PhoenicisPlayOnLinux:13598): Gdk-CRITICAL **: 01:33:24.348: gdk_x11_display_set_window_scale: assertion 'GDK_IS_X11_DISPLAY (display)' failed
#
# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGSEGV (0xb) at pc=0x0000000000000002, pid=13598, tid=13636
#
# JRE version: OpenJDK Runtime Environment (11.0.1+13) (build 11.0.1+13)
# Java VM: OpenJDK 64-Bit Server VM (11.0.1+13, mixed mode, tiered, compressed oops, g1 gc, linux-amd64)
# Problematic frame:
# C  0x0000000000000002
#
# Core dump will be written. Default location: Core dumps may be processed with "/usr/lib/systemd/systemd-coredump %P %u %g %s %t %c %h %e" (or dumping to /usr/share/phoenicis/app/core.13598)
#
# An error report file with more information is saved as:
# /tmp/hs_err_pid13598.log
#
# If you would like to submit a bug report, please visit:
#   http://bugreport.java.com/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#
/usr/bin/phoenicis: line 3: 13598 Aborted                 (core dumped) /usr/share/phoenicis/PhoenicisPlayOnLinux "$@"

The hs_err_pid13598.log is here: https://pastebin.com/2y1TXwei

Steps to reproduce

1. Use Gnome Wayland session in some linux distribution
2. Run phoenicis

System information

• software version (git revision) of phoenicis and scripts repositories:
  I tried version alpha2 both with the provided linux tar.gz and with building the package myself
• used operating system:
  Arch linux
• used Java version:
  Openjdk 11.0.1

[qparis]

Hum interesting. Thank you.

Can you try to export this environnement variable before running Phoenicis?

export GDK_BACKEND=x11

[ImperatorS79]

Javafx does not work on Xwayland, unless you use the workaround here javafxports/openjdk-jfx#175. The bug is solved in openjfx12.

[ThanosApostolou]

You are right, it works fine with GDK_BACKEND=x11.

I patched the launcher (https://aur.archlinux.org/cgit/aur.git/plain/fix-launcher-on-wayland.patch?h=phoenicis-playonlinux) at my AUR package (https://aur.archlinux.org/packages/phoenicis-playonlinux/) in order to make it work for everyone. I don't know if you want to add it at official builds too.

[plata]

This variable does not have any effect if you're on X11 anyways, right?

[ThanosApostolou]

From what I know, it doesn't have any effect on x11. I tested it and it works fine on both Wayland and Xorg Gnome sessions.

[plata]

Ok, then we should set it. The question is if we can find a smart solution such that it is used everywhere (I don't think it's possible to do this in Java).

[qparis]

In fact on OSX, we need to override some environment variables to extend the PATH. Other cases may happen.
I suggest we make phoenicis_build_package create a launcher script that setup-up required environement variables.
I think we need to include a launcher script inside the officials.

[plata]

Ok.

[madoar]

I think this has been fixed in the latest JavaFX release 11.0.2

[plata]

@ThanosApostolou if you still have the issue, feel free to re-open.