Hello,

As per the subject, I am unable to do the following:

plot(1);

The error message I get is ( as user postgres)

No protocol specified
Error in X11(d$display, d$width, d$height, d$pointsize, d$gamma,
d$colortype,  :
  unable to start device X11cairo
In addition: Warning message:
In function (display = "", width, height, pointsize, gamma, bg,  :
  unable to open connection to X11 display ''

I have tried looking around before posting to the mailing list, but I don't
have the Linux knowledge to make this work.

Some helpful information might be the truncated output from capabilities() -
the output suggests the probable cause for this error, but I don't know how
to fix it.

as user postgres:
> capabilities()
X11     cairo
FALSE     TRUE


as user root:
> capabilities()
X11     cairo
TRUE     TRUE


Any help is appreciated.

Thanks,
MW

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