QScreen Connect Problem

[dreamerindia]

I have configure Linux Framebuffer has /dev/fb0, Using Examples/qws/framebuffer project is working fine, but
When I am trying to connect using QScreen object it gives th following error
@
QPluginLoader *objPlug = new QPluginLoader("libcheckPlugin1.so",this);
QScreenDriverPlugin obj = qobject_cast<QScreenDriverPlugin>(objPlug->instance());
QScreen *objScr = obj->create("dbscreen",QScreen::LinuxFBClass);
objScr->connect("LinuxFb:/dev/fb0" );
objScr->initDevice();@

It gives segementation fault.

Kindly give me solution to connect the Framebuffer using QScreen plugin.

[SGaist]

Hi,

You should add some sanity check to your code. You don't verify that the plugin is correctly loaded, nor that any object is valid.

[dreamerindia]

@ QPluginLoader *objPlug = new QPluginLoader("libcheckPlugin1.so",this);
QScreenDriverPlugin obj = qobject_cast<QScreenDriverPlugin>(objPlug->instance());

• if(obj != NULL)
  qDebug()<<"Object Reference:"<<obj->keys();
• QScreen *objScr = obj->create("dbscreen",QScreen::LinuxFBClass);
  objScr->connect("LinuxFb:/dev/fb0" );
  objScr->initDevice();;@

I have added the object check to my code and it is valid Screen plugin. but when I am trying to initdevice it is throwing segmentation fault. please let me know any certain configuration are required to init framebuffer device.

[SGaist]

Do you have a stack trace of the crash ?

[dreamerindia]

I dont find any stack trace but give me clue to debug any stack trace for this object.

[SGaist]

Then you should run your application using a debugger so you would be able to see where exactly it crashes