Initially I was not aware of the X server. With a detailed study about X
server and X window system, I could solve this issue.
Thank You for the information and help.
Thanks & Regards,
On Wednesday, February 15, 2017 at 10:00:01 PM UTC+5:30, Przemek Klosowski
> On Wed, Feb 15, 2017 at 12:23 AM, sajeevan k <saje...@laxven.com
> > I stated the X server with startx command.
> > Also now a default display is coming in the LCD display(which may be the
> > BBB's default display)
> That's good. I don't know about the erorrs---it looks like the GL
> software rendering is turned off but simple X should work now.
> > Now I tried to run a simpleQt program, by opening another terminal. But
> > is only showing the following message in the terminal.
> > root@localhost:~# ./simpleQt
> > QXcbConnection: Could not connect to display
> Are you doing that from the same terminal as the one you ran startx
> from? What is the value of the DISPLAY environment variable?
> Try doing
> DISPLAY=:0 ./simpleQt
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