The problem : I can't run my Qt5 app as a normal X window. It is always full screen.
I successfully compiled Qt5 and I can deploy a simple program to the RPi : Qt Creator uploads the executable to the RPi and runs it. The widget shows up full-screen on a HDMI attached monitor. The problem is that I can't switch applications, and I can't view the program widget on another computer screen (ubuntu or windows).
I configured a VNC server on the RPi, which works fine. I'd like to run the RPi without a monitor and connect via VNC from time to time to check my program. Ssh X forwarding doesn't work either.
configure -opengl es2 -device linux-rasp-pi-g++ -device-option CROSS_COMPILE=/home/USERNAME/opt/rpi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/arm-linux-gnueabihf- -sysroot /mnt/rpi -opensource -confirm-license -optimized-qmake -release -make libs -prefix /usr/local/qt5pi -no-pch -qt-xcb
And the config.summary file contents :
Configure summary Building on: linux-g++ (x86_64, CPU features: mmx sse sse2) Building for: devices/linux-rasp-pi-g++ (arm, CPU features:) Platform notes: - Also available for Linux: linux-kcc linux-icc linux-cxx Build options: Configuration .......... accessibility audio-backend c++11 clock-gettime clock-monotonic compile_examples concurrent cross_compile egl eglfs evdev eventfd freetype full-config getaddrinfo getifaddrs iconv inotify ipv6ifname large-config largefile linuxfb medium-config minimal-config mremap nis no-harfbuzz opengl opengles2 pcre png posix_fallocate qpa qpa reduce_exports release rpath shared small-config system-zlib xcb xcb-plugin xcb-qt xkbcommon-qt xlib Build parts ............ libs Mode ................... release Using C++11 ............ yes Using PCH .............. no Target compiler supports: iWMMXt/Neon .......... no/auto Qt modules and options: Qt D-Bus ............... no Qt Concurrent .......... yes Qt GUI ................. yes Qt Widgets ............. yes Large File ............. yes QML debugging .......... yes Use system proxies ..... no Support enabled for: Accessibility .......... yes ALSA ................... no CUPS ................... no Evdev .................. yes FontConfig ............. no FreeType ............... yes (bundled copy) Glib ................... no GTK theme .............. no HarfBuzz ............... no Iconv .................. yes ICU .................... no Image formats: GIF .................. yes (plugin, using bundled copy) JPEG ................. yes (plugin, using bundled copy) PNG .................. yes (in QtGui, using bundled copy) journald ............... no mtdev .................. no Networking: getaddrinfo .......... yes getifaddrs ........... yes IPv6 ifname .......... yes OpenSSL .............. no NIS .................... yes OpenGL / OpenVG: EGL .................. yes OpenGL ............... yes (OpenGL ES 2.x) OpenVG ............... no PCRE ................... yes (bundled copy) pkg-config ............. yes PulseAudio ............. no QPA backends: DirectFB ............. no EGLFS ................ yes KMS .................. no LinuxFB .............. yes XCB .................. yes (bundled copy) EGL on X ........... no GLX ................ no MIT-SHM ............ yes Xcb-Xlib ........... no Xcursor ............ yes (loaded at runtime) Xfixes ............. yes (loaded at runtime) Xi ................. yes (loaded at runtime) Xi2 ................ no Xinerama ........... yes (loaded at runtime) Xrandr ............. yes (loaded at runtime) Xrender ............ no XKB ................ yes XShape ............. yes XSync .............. yes XVideo ............. yes Session management ..... yes SQL drivers: DB2 .................. no InterBase ............ no MySQL ................ no OCI .................. no ODBC ................. no PostgreSQL ........... no SQLite 2 ............. no SQLite ............... yes (plugin, using bundled copy) TDS .................. no udev ................... no xkbcommon .............. yes (bundled copy, XKB config root: /usr/share/X11/xkb) zlib ................... yes (system library) NOTE: libxkbcommon and libxkbcommon-x11 0.4.1 or higher not found on the system, will use the bundled version from 3rd party directory. NOTE: Qt is using double for qreal on this system. This is binary incompatible against Qt 5.1. Configure with '-qreal float' to create a build that is binary compatible with 5.1.