From p.dalgaard at biostat.ku.dk  Sat Oct 27 02:45:53 2007
From: p.dalgaard at biostat.ku.dk (Peter Dalgaard)
Date: Sat, 27 Oct 2007 02:45:53 +0200
Subject: [Rd] (PR#10379) Re:  x11(....) kills R without DISPLAY
In-Reply-To: <472287D2.1020603@cimr.cam.ac.uk>
References: <20071026223005.3CF422834619@mail.pubhealth.ku.dk>
	<472277D5.9080202@biostat.ku.dk> <472287D2.1020603@cimr.cam.ac.uk>
Message-ID: <47228A41.5050901@biostat.ku.dk>

Hin-Tak Leung wrote:
> Peter Dalgaard wrote:
>> brechbuehler at gmail.com wrote:
>>> Full_Name: Christian Brechbuehler
>>> Version: 2.4.1, 2.5.1, OS: Ubuntu GNU/Linux
>>> Submission from: (NULL) (24.61.47.236)
>>>
>>>
> <snipped>
>>> Example (start R without DISPLAY from bash):
>>>   % DISPLAY= R
>>>   > x11("localhost:11.0")                        # this is my valid 
>>> DISPLAY
>>>   Error: Couldn't find per display information
>>>   %
> <snipped>
>>>   
>> I see this on Fedora 7 too. I suspect that the earlier report was 
>> thought to be Mac specific.
> <snipped>
>
> I was experimenting with xvfb last week and didn't see the catatrophic 
> problem like that, so I tried again. Is it possible that this has 
> already been fixed in R 2.6.0 ? (I am on fedora 7, x86_64 as well).
>
> ------------------------------------------
> $ export -n DISPLAY
>
> $ R
> R version 2.6.0 (2007-10-03)
> ...
> > x11()
> Error in X11(display, width, height, pointsize, if (is.null(gamma)) 1 
> else gamma,  :
>   unable to start device X11
> In addition: Warning message:
> In x11() : unable to open connection to X11 display ''
> > q()
> Save workspace image? [y/n/c]: n
> $ export DISPLAY=
> $ R
> R version 2.6.0 (2007-10-03)
> ...
> > x11()
> Error in X11(display, width, height, pointsize, if (is.null(gamma)) 1 
> else gamma,  :
>   unable to start device X11
> In addition: Warning message:
> In x11() : unable to open connection to X11 display ''
> > q()
> Save workspace image? [y/n/c]: n
> --------------------------------------------------
>
You need x11() with a valid display to trigger the bug:

[pd at titmouse2 BUILD]$ ssh -Y 192.168.1.10
pd at 192.168.1.10's password:
Last login: Sat Oct 27 02:40:16 2007 from 192.168.1.11
[pd at janus ~]$ echo $DISPLAY
localhost:10.0
[pd at janus ~]$ DISPLAY= R -q
 > x11("localhost:10.0")
Error: Couldn't find per display information
[pd at janus ~]$ uname -a
Linux janus 2.6.22.9-91.fc7 #1 SMP Thu Sep 27 20:47:39 EDT 2007 x86_64 
x86_64 x86_64 GNU/Linux
[pd at janus ~]$ cat /etc/issue
Fedora release 7 (Moonshine)
Kernel \r on an \m


-- 
   O__  ---- Peter Dalgaard             ?ster Farimagsgade 5, Entr.B
  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
 (*) \(*) -- University of Copenhagen   Denmark          Ph:  (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)                  FAX: (+45) 35327907



[Rd] (PR#10379) Re: x11(....) kills R without DISPLAY
Peter Dalgaard