Gtk: cannot open display error

[Hongze Zhao]

Hi All,

Sorry for noob question again.

I am running weston-launch in a tty, which I suppose should launch a weston
compositor outside X.
In the desktop showed, I can launch weston-terminal and other sample
programs listed in the end of http://wayland.freedesktop.org/building.html.

However, nothing happens after I clicked the chrome icon in the upper left
corner. In the terminal after I executed "google-chrome", it says:
ERROR: browser main loop.cc(209)] Gtk: cannot open display:

Could anyone give me some hints to solve this problem? I guess I missed
setting some environment variables?

Thanks,
Hongze
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