On arm linux, Qml/Qwidget with xcb cannot work
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Dear all,
I compiled Qt5.5.1 open source for the platform of arm with embeded linux; and the qml demo works well when the QT_QPA_PLATFORM=eglfs; the qwidget demo works well when the QT_QPA_PLATFORM=linuxfb.
However, once I change the value of QT_QPA_PLATFORM to 'xcb', qml and qwidget demo cannot work and failed with these errors:QXcbConnection: XCB error: 149 (Unknown), sequence: 165, resource id: 69, major code: 144 (Unknown), minor code: 20
QXcbConnection: XCB error: 16 (BadLength), sequence: 187, resource id: 226, major code: 1 (CreateWindow), minor code: 0
QXcbConnection: XCB error: 16 (BadLength), sequence: 191, resource id: 2097155, major code: 1 (CreateWindow), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 192, resource id: 2097156, major code: 2 (ChangeWindowAttributes), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 193, resource id: 2097156, major code: 18 (ChangeProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 194, resource id: 2097156, major code: 18 (ChangeProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 195, resource id: 2097156, major code: 18 (ChangeProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 196, resource id: 2097156, major code: 18 (ChangeProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 197, resource id: 2097156, major code: 18 (ChangeProperty), minor code: 0
QXcbConnection: XCB error: 16 (BadLength), sequence: 198, resource id: 2097156, major code: 1 (CreateWindow), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 199, resource id: 2097157, major code: 18 (ChangeProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 200, resource id: 2097156, major code: 18 (ChangeProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 203, resource id: 2097156, major code: 2 (ChangeWindowAttributes), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 204, resource id: 2097156, major code: 18 (ChangeProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 205, resource id: 2097156, major code: 18 (ChangeProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 206, resource id: 2097156, major code: 20 (GetProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 210, resource id: 2097156, major code: 18 (ChangeProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 211, resource id: 2097156, major code: 19 (DeleteProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 216, resource id: 2097156, major code: 19 (DeleteProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 217, resource id: 2097156, major code: 18 (ChangeProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 218, resource id: 2097156, major code: 18 (ChangeProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 225, resource id: 2097156, major code: 2 (ChangeWindowAttributes), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 226, resource id: 2097156, major code: 2 (ChangeWindowAttributes), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 227, resource id: 2097156, major code: 20 (GetProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 228, resource id: 2097156, major code: 18 (ChangeProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 229, resource id: 2097156, major code: 18 (ChangeProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 230, resource id: 2097156, major code: 20 (GetProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 231, resource id: 2097156, major code: 18 (ChangeProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 232, resource id: 2097156, major code: 19 (DeleteProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 233, resource id: 2097156, major code: 8 (MapWindow), minor code: 0Could you help me?
Thank you.
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the Qt configure result:
Build options:
Configuration .......... accessibility accessibility-atspi-bridge alsa audio-backend clock-gettime clock-monotonic compile_examples concurrent dbus egl egl_x11 eglfs enable_new_dtags evdev eventfd fontconfig full-config getaddrinfo getifaddrs glib gstreamer-0.10 gtk2 gtkstyle harfbuzz iconv inotify ipv6ifname large-config largefile linuxfb medium-config minimal-config mremap nis opengl opengles2 openssl png posix_fallocate precompile_header qpa qpa reduce_exports release rpath shared small-config system-freetype system-png system-zlib xcb xcb-glx xcb-plugin xcb-render xcb-sm xcb-xlib xinput2 xkbcommon-qt xlib xrender
Build parts ............ libs tools
Mode ................... release
Using sanitizer(s)...... none
Using C++11 ............ no
Using gold linker....... no
Using new DTAGS ........ yes
Using PCH .............. yes
Target compiler supports:
Neon ................. noQt modules and options:
Qt D-Bus ............... yes (loading dbus-1 at runtime)
Qt Concurrent .......... yes
Qt GUI ................. yes
Qt Widgets ............. yes
Large File ............. yes
QML debugging .......... yes
Use system proxies ..... noSupport enabled for:
Accessibility .......... yes
ALSA ................... yes
CUPS ................... no
Evdev .................. yes
FontConfig ............. yes
FreeType ............... yes (system library)
Glib ................... yes
GStreamer .............. yes (0.10)
GTK theme .............. yes
HarfBuzz ............... yes (bundled copy)
Iconv .................. yes
ICU .................... no
Image formats:
GIF .................. yes (plugin, using bundled copy)
JPEG ................. yes (plugin, using bundled copy)
PNG .................. yes (in QtGui, using system library)
journald ............... no
libinput................ no
mtdev .................. no
Networking:
getaddrinfo .......... yes
getifaddrs ........... yes
IPv6 ifname .......... yes
libproxy.............. no
OpenSSL .............. yes (loading libraries at run-time)
NIS .................... yes
OpenGL / OpenVG:
EGL .................. yes
OpenGL ............... yes (OpenGL ES 2.0+)
OpenVG ............... no
PCRE ................... system
pkg-config ............. yes
PulseAudio ............. no
QPA backends:
DirectFB ............. no
EGLFS ................ yes
EGLFS i.MX6....... . no
EGLFS KMS .......... no
EGLFS Mali ......... no
EGLFS Raspberry Pi . no
EGLFS X11 .......... yes
LinuxFB .............. yes
XCB .................. yes (system library)
EGL on X ........... yes
GLX ................ yes
MIT-SHM ............ yes
Xcb-Xlib ........... yes
Xcursor ............ yes (loaded at runtime)
Xfixes ............. yes (loaded at runtime)
Xi ................. no
Xi2 ................ yes
Xinerama ........... yes (loaded at runtime)
Xrandr ............. yes (loaded at runtime)
Xrender ............ yes
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
tslib .................. no
udev ................... no
xkbcommon-x11........... yes (bundled copy, XKB config root: /usr/share/X11/xkb)
xkbcommon-evdev......... no
zlib ................... yes (system library)
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Hi and welcome to devnet,
Are you using the same version of the XCB libraries when building Qt and running your application ?
