Cross/remote debugging

[Pardalis]

hi

I have started a little project to control a terrarium with the raspberry pi.

I have installed Qt 5.2.0 with QT Creator 3.0.0 on Ubuntu 12.04.4 LTS (64Bit).
The same is on my RPI with raspian.

when i try to start the application without any parameters, the following messages would be shown:
@QSocketNotifier: Can only be used with threads started with QThread
EGLFS: Unable to query physical screen size, defaulting to 100 dpi.
EGLFS: To override, set QT_QPA_EGLFS_PHYSICAL_WIDTH and QT_QPA_EGLFS_PHYSICAL_HEIGHT (in millimeters).
EGLFS: Unable to query screen depth, defaulting to 32.
EGLFS: To override, set QT_QPA_EGLFS_DEPTH.
This plugin does not support propagateSizeHints()
@

When i start the Application with -platform xcb it will run fine, but i receive 2 messages:
@Cant find EGLConfig, returning null config
Unable to find an X11 visual which matches EGL config 0
@

When i try to debug, i can't see any values from the variables but the breakpoints are working.
when i just start the program with the debugger , also with "-platform xcb" i get some strange issues.

the debugger ist located here:
/home/*****/src/rpi/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/arm-linux-gnueabihf-gdb

i also got this "cannot find egl error". The Program starts and breakpoints are hit, but i cannot see any values of the variables.
And it also looks like my programm cannot acces the file system if i start it from the debugger.

Im a linux newbie, i would really appreciated if someone can help me.