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Qt 5.4 Linux deployment app could not find or load the Qt platform plugin xcb ? ( ldd is happy )

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I installed Qt5.4 in an Ubuntu 10.04 LTS development VM. I can build and run aps fine in the VM. The problem is I cannot deploy to another Ubuntu 10.04 LTS machine. I copied the Qt5.4 shared libs to /opt/lib/ I copied the /plugins/platform/ folder to /opt/lib/ I copied the qt54-hello test app to /opt/lib/ ldd has no complaints about either the qt54-hello app or /plugins/platforms/libqxcb.so         ldd /opt/lib/qt54-hello    linux-gate.so.1 =>  (0x00c1a000)  libQt5Widgets.so.5 => /opt/lib/libQt5Widgets.so.5 (0x00110000)  libQt5Gui.so.5 => /opt/lib/libQt5Gui.so.5 (0x00c1b000)  libQt5Core.so.5 => /opt/lib/libQt5Core.so.5 (0x0b5dc000)  libGL.so.1 => /usr/lib/mesa/libGL.so.1 (0x009a1000)  libpthread.so.0 => /lib/tls/i686/cmov/libpthread.so.0 (0x00787000)  libstdc++.so.6 => /opt/lib/libstdc++.so.6 (0x007a0000)  libm.so.6 => /lib/tls/i686/cmov/libm.so.6 (0x00a95000)  libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x0088c000)  libc.so.6 => /lib/tls/i686/cmov/libc.so.6 (0x00abb000)  libgobject-2.0.so.0 => /usr/lib/libgobject-2.0.so.0 (0x008ab000)  libglib-2.0.so.0 => /lib/libglib-2.0.so.0 (0x06207000)  libX11.so.6 => /usr/lib/libX11.so.6 (0x090b5000)  libicui18n.so.53 => /opt/lib/libicui18n.so.53 (0x023ee000)  libicuuc.so.53 => /opt/lib/libicuuc.so.53 (0x13838000)  libdl.so.2 => /lib/tls/i686/cmov/libdl.so.2 (0x008ea000)  libgthread-2.0.so.0 => /usr/lib/libgthread-2.0.so.0 (0x008ee000)  librt.so.1 => /lib/tls/i686/cmov/librt.so.1 (0x008f4000)  /lib/ld-linux.so.2 (0x0093a000)  libXext.so.6 => /usr/lib/libXext.so.6 (0x008fd000)  libXxf86vm.so.1 => /usr/lib/libXxf86vm.so.1 (0x0090d000)  libXdamage.so.1 => /usr/lib/libXdamage.so.1 (0x00913000)  libXfixes.so.3 => /usr/lib/libXfixes.so.3 (0x00917000)  libdrm.so.2 => /lib/libdrm.so.2 (0x00a15000)  libpcre.so.3 => /lib/libpcre.so.3 (0x00957000)  libxcb.so.1 => /usr/lib/libxcb.so.1 (0x0091d000)  libicudata.so.53 => /opt/lib/libicudata.so.53 (0xb627f000)  libXau.so.6 => /usr/lib/libXau.so.6 (0x00988000)  libXdmcp.so.6 => /usr/lib/libXdmcp.so.6 (0x00a3e000)         ldd /opt/lib/plugins/platforms/libqxcb.so    linux-gate.so.1 =>  (0x00421000)  libX11-xcb.so.1 => /usr/lib/libX11-xcb.so.1 (0x009a7000)  libXi.so.6 => /usr/lib/libXi.so.6 (0x00275000)  libSM.so.6 => /usr/lib/libSM.so.6 (0x00110000)  libICE.so.6 => /usr/lib/libICE.so.6 (0x00163000)  libdl.so.2 => /lib/tls/i686/cmov/libdl.so.2 (0x00ef8000)  libxcb.so.1 => /usr/lib/libxcb.so.1 (0x00568000)  libfontconfig.so.1 => /usr/lib/libfontconfig.so.1 (0x00631000)  libfreetype.so.6 => /usr/lib/libfreetype.so.6 (0x00b5d000)  libglib-2.0.so.0 => /lib/libglib-2.0.so.0 (0x00c84000)  libXrender.so.1 => /usr/lib/libXrender.so.1 (0x00b37000)  libX11.so.6 => /usr/lib/libX11.so.6 (0x00283000)  libQt5Gui.so.5 => /opt/lib/libQt5Gui.so.5 (0x00efc000)  libQt5DBus.so.5 => /opt/lib/libQt5DBus.so.5 (0x0017c000)  libQt5Core.so.5 => /opt/lib/libQt5Core.so.5 (0x05985000)  libGL.so.1 => /usr/lib/mesa/libGL.so.1 (0x00204000)  libpthread.so.0 => /lib/tls/i686/cmov/libpthread.so.0 (0x00119000)  libstdc++.so.6 => /opt/lib/libstdc++.so.6 (0x00807000)  libm.so.6 => /lib/tls/i686/cmov/libm.so.6 (0x00132000)  libc.so.6 => /lib/tls/i686/cmov/libc.so.6 (0x009aa000)  libXext.so.6 => /usr/lib/libXext.so.6 (0x003a0000)  libuuid.so.1 => /lib/libuuid.so.1 (0x003b1000)  /lib/ld-linux.so.2 (0x0048a000)  libXau.so.6 => /usr/lib/libXau.so.6 (0x00158000)  libXdmcp.so.6 => /usr/lib/libXdmcp.so.6 (0x0015c000)  libz.so.1 => /lib/libz.so.1 (0x003b6000)  libexpat.so.1 => /lib/libexpat.so.1 (0x003e5000)  libpcre.so.3 => /lib/libpcre.so.3 (0x00422000)  libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x00453000)  libicui18n.so.53 => /opt/lib/libicui18n.so.53 (0x0c924000)  libicuuc.so.53 => /opt/lib/libicuuc.so.53 (0x00d4e000)  libgthread-2.0.so.0 => /usr/lib/libgthread-2.0.so.0 (0x00269000)  librt.so.1 => /lib/tls/i686/cmov/librt.so.1 (0x003cb000)  libXxf86vm.so.1 => /usr/lib/libXxf86vm.so.1 (0x00533000)  libXdamage.so.1 => /usr/lib/libXdamage.so.1 (0x0026f000)  libXfixes.so.3 => /usr/lib/libXfixes.so.3 (0x003d4000)  libdrm.so.2 => /lib/libdrm.so.2 (0x00bd6000)  libicudata.so.53 => /opt/lib/libicudata.so.53 (0xb63d0000) How can I determine what is missing if ldd is happy? Thanks in advance, -Ed

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