On Tue, 31 Mar 2020 12:04:54 -0700 (PDT), in
gmane.comp.hardware.beagleboard.user "'VLeshka' via BeagleBoard"
<beagleboard-/[email protected]> wrote:
>Hi!
>I have compile the gui program by QT5.9 (sudo apt install qt5-default).
>The compiling complete finely at lxqt and debian9:
LXQT is a Desktop Environment running ON some OS; Debian is an OS.
The LXQT image http://beagleboard.org/latest-images IS Debian 9 (AKA:
Stretch), with the additional packages needed to run an X server (display).
The IoT image there does not have a desktop environment or X server.
>
>At lxqt, the binary program runs finely. But lxqt take up too much space,
>so I need in debian9.
>But at debian9, running the binary file returns an error:
>QXcbConnection: Could not connect to display
>
You are going to have to add enough stuff to provide, at minimum, an X
server implementation -- and most likely you'll need a window/desktop
manager.
Many years ago, BBB used LXDE, which is supposed to be a lighter-weight
system https://en.wikipedia.org/wiki/LXDE
You might be able to build the components you need (at the least,
session manager and display manager, along with X-Window server). Note
however that LXQT was derived from LXDE replacing GTK+ with Qt; so may not
gain all that much reverting to just LXDE.
>Also I can run the gui program at debian9 from another PC by:
>ssh -X 192.168.X.X -l debian
>but this doesn't solve the problem.
>
Because that "another PC" is providing the X server (the display
system). Your program is only a client sending X-window commands to the
system that has the display/server capability.
--
Dennis L Bieber
--
For more options, visit http://beagleboard.org/discuss
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