Qt Platform Plugin could not be initiated

[xiaodong-hu]

I tried JingOS on my Thinkpad X1 Yoga gen3. I was truly astonished 'cause almost all function works as expected, except when I try to install some applications like mathematica, netease-cloud-music, and xDroid etc.

For example, when running mathematica (newest version 12.3), I get

Qt issued a fatal error: This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: linuxfb, minimal, offscreen, vnc, xcb.

Qt tried to load plugins from:
/usr/local/Wolfram/Mathematica/12.3/SystemFiles/Libraries/Linux-x86-64/Qt/plugins
/usr/local/Wolfram/Mathematica/12.3/SystemFiles/FrontEnd/Binaries/Linux-x86-64

Mathematica was installed in /usr/local/Wolfram/Mathematica/12.3
Aborted (core dumped)

When running netease-cloud-music (ubuntu deb from official website), I get

This application failed to start because it could not find or load the Qt platform plugin "wayland"
in "/opt/netease/netease-cloud-music/plugins/platforms".

Available platform plugins are: eglfs (from /opt/netease/netease-cloud-music/plugins/platforms), linuxfb (from /opt/netease/netease-cloud-music/plugins/platforms), minimal (from /opt/netease/netease-cloud-music/plugins/platforms), minimalegl (from /opt/netease/netease-cloud-music/plugins/platforms), offscreen (from /opt/netease/netease-cloud-music/plugins/platforms), vnc (from /opt/netease/netease-cloud-music/plugins/platforms), xcb (from /opt/netease/netease-cloud-music/plugins/platforms), eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, xcb.

Reinstalling the application may fix this problem.
Received signal 6
#0 0x7f231eb65526 <unknown>
#1 0x7f231eb65909 <unknown>
#2 0x7f2324c28210 <unknown>
#3 0x7f2324c2818b gsignal
#4 0x7f2324c07859 abort
#5 0x7f2325085fa7 QMessageLogger::fatal()
#6 0x7f2325abf31a QGuiApplicationPrivate::createPlatformIntegration()
#7 0x7f2325abf41d QGuiApplicationPrivate::createEventDispatcher()
#8 0x7f2325280865 QCoreApplicationPrivate::init()
#9 0x7f2325ac0eaf QGuiApplicationPrivate::init()
#10 0x7f2327acf649 QApplicationPrivate::init()
#11 0x56166a62ad83 <unknown>
#12 0x56166a628d50 <unknown>
#13 0x7f2324c090b3 __libc_start_main
#14 0x56166a629efa <unknown>
  r8: 0000000000000000  r9: 00007ffc69023b00 r10: 0000000000000008 r11: 0000000000000246
 r12: 000056166c60c8d0 r13: 00007ffc69023f10 r14: 0000000000000018 r15: 00007ffc69023f08
  di: 0000000000000002  si: 00007ffc69023b00  bp: 00007ffc69023f18  bx: 00007f230f952d00
  dx: 0000000000000000  ax: 0000000000000000  cx: 00007f2324c2818b  sp: 00007ffc69023b00
  ip: 00007f2324c2818b efl: 0000000000000246 cgf: 002b000000000033 erf: 0000000000000000
 trp: 0000000000000000 msk: 0000000000000000 cr2: 0000000000000000
[end of stack trace]
Calling _exit(1). Core file will not be generated.

I googled for help, but almost all solutions asked to look at the outputs of ldd (and then install the required pkg), which seems to be normal for me.

Are there any solutions for the error? Thanks.

[JingOS-team]

@cdqz2014 How did you install them? Did you run them in konsole? You can check the "QT_QPA_PLATFORM" enviroment in you shell, the default value is "wayland". If the app have it's own qt libs and doesn't provide wayland qpa plugins, it will get a "not found" error. You can modify the enviorment by running “export QT_QPA_PLATFORM=xcb” in you shell ，and then try to run them again.

[xiaodong-hu]

@JingOS-team Yes the default environment QT_QPA_PLATFORM=wayland is not working for mathematica. After export to xcb it runs! So does netease-cloud-music. Thanks.

BTW, since I set the global scaling of KDE to 100%, netease-cloud-music is not showing fullscreen. Are there any patch to it?