I cannot start the (android) emulator64-x86. It always fails with:

--> ./emulator64-x86 -avd loli -gpu off        This application failed to start because it could not find or load the Qt platform plugin "xcb" in "".  Available platform plugins are: linuxfb, minimal, offscreen, xcb.  Reinstalling the application may fix this problem. zsh: abort      ./emulator64-x86 -avd loli -gpu off 

Every forum thread I found on thw problem was to run ldd on the emulator64 and the XCB library to check for missing dependencies:

--> ldd emulator64-x86                      linux-vdso.so.1 (0x00007ffefb048000)     librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f3bfefb5000)     libX11.so.6 => /usr/lib/x86_64-linux-gnu/libX11.so.6 (0x00007f3bfec75000)     libGL.so.1 => /usr/lib/x86_64-linux-gnu/libGL.so.1 (0x00007f3bfe9e9000)     libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f3bfe7e5000)     libQt5Widgets.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5 (0x00007f3bfdf9f000)     libQt5Gui.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 (0x00007f3bfd838000)     libQt5Core.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 (0x00007f3bfd14d000)     libQt5Svg.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Svg.so.5 (0x00007f3bfcef8000)     libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f3bfcb73000)     libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f3bfc828000)     libutil.so.1 => /lib/x86_64-linux-gnu/libutil.so.1 (0x00007f3bfc625000)     libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f3bfc407000)     libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f3bfc1ef000)     libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f3bfbe39000)     /lib64/ld-linux-x86-64.so.2 (0x00007f3bff1bd000)     libxcb.so.1 => /usr/lib/x86_64-linux-gnu/libxcb.so.1 (0x00007f3bfbc11000)     libGLX.so.0 => /usr/lib/x86_64-linux-gnu/libGLX.so.0 (0x00007f3bfb9e0000)     libGLdispatch.so.0 => /usr/lib/x86_64-linux-gnu/libGLdispatch.so.0 (0x00007f3bfb72a000)     libpng16.so.16 => /usr/lib/x86_64-linux-gnu/libpng16.so.16 (0x00007f3bfb4f7000)     libharfbuzz.so.0 => /usr/lib/x86_64-linux-gnu/libharfbuzz.so.0 (0x00007f3bfb258000)     libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f3bfb03e000)     libicui18n.so.57 => /usr/lib/x86_64-linux-gnu/libicui18n.so.57 (0x00007f3bfabca000)     libicuuc.so.57 => /usr/lib/x86_64-linux-gnu/libicuuc.so.57 (0x00007f3bfa825000)     libpcre2-16.so.0 => /usr/lib/x86_64-linux-gnu/libpcre2-16.so.0 (0x00007f3bfa5b8000)     libdouble-conversion.so.1 => /usr/lib/x86_64-linux-gnu/libdouble-conversion.so.1 (0x00007f3bfa3a7000)     libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007f3bfa093000)     libXau.so.6 => /usr/lib/x86_64-linux-gnu/libXau.so.6 (0x00007f3bf9e8f000)     libXdmcp.so.6 => /usr/lib/x86_64-linux-gnu/libXdmcp.so.6 (0x00007f3bf9c89000)     libXext.so.6 => /usr/lib/x86_64-linux-gnu/libXext.so.6 (0x00007f3bf9a77000)     libfreetype.so.6 => /usr/lib/x86_64-linux-gnu/libfreetype.so.6 (0x00007f3bf97c2000)     libgraphite2.so.3 => /usr/lib/x86_64-linux-gnu/libgraphite2.so.3 (0x00007f3bf9595000)     libicudata.so.57 => /usr/lib/x86_64-linux-gnu/libicudata.so.57 (0x00007f3bf7b18000)     libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007f3bf78a6000)     libbsd.so.0 => /lib/x86_64-linux-gnu/libbsd.so.0 (0x00007f3bf7691000) 

And for LibXCB:

--> ldd /usr/lib/x86_64-linux-gnu/libxcb.so.1      linux-vdso.so.1 (0x00007ffc465d8000)     libXau.so.6 => /usr/lib/x86_64-linux-gnu/libXau.so.6 (0x00007f68c727c000)     libXdmcp.so.6 => /usr/lib/x86_64-linux-gnu/libXdmcp.so.6 (0x00007f68c7076000)     libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f68c6cc0000)     libbsd.so.0 => /lib/x86_64-linux-gnu/libbsd.so.0 (0x00007f68c6aab000)     /lib64/ld-linux-x86-64.so.2 (0x00007f68c76a8000)     librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f68c68a3000)     libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f68c6685000) 

Additional details:

• Android emulator version 27.1.7.0 (build_id 4581633) (CL:b5ec07662db0f9d8644e5fbda7040053a8741bfd)
• Debian SID x64

So it seems that all dependencies are OK. How can I debug that issue further ? Any idea how can I make the emulator work ?

It turned out I can run QT with debug logging:

QT_DEBUG_PLUGINS=1 ./emulator64-x86 -avd loli -gpu off 

So I it fails because of:

Cannot load library /home/svetlin/software/android/emulator/lib64/qt/plugins/platforms/libqxcb.so: (/home/svetlin/software/android/emulator/lib64/qt/plugins/platforms/libqxcb.so: symbol _ZN26QPlatformIntegrationPlugin6createERK7QStringRK11QStringList, version Qt_5 not defined in file libQt5Gui.so.5 with link time reference)