[Rd] X11() dies in remote background

[Vincent Carey 525-2265]

this is not a problem with R but a request for related advice.

i am trying to run a lengthy batch job from my home.

the OS is ...
Linux jedi.bwh.harvard.edu 2.4.22-openmosix1smp #1 SMP Fri Sep 5 01:05:37 CEST
2003 i686 athlon i386 GNU/Linux

i start the job and put it in the background.  while i am connected, all is
well.  eventually my ISP shuts down the connection if i do not do any
input.  then:


Boxplots of G intensitiesError in X11(paste("png::", filename, sep = ""), width, height, pointsize,  :
  unable to start device PNG
Calls: doPlot -> qcBeadLevel -> png
In addition: Warning message:
In png(filename, width = 640, height = 480) :
  unable to open connection to X11 display ''
Execution halted

is it possible to have X11() succeed when there is no real display to connect
to?

R version 2.6.0 Under development (unstable) (2007-06-29 r42093)
i686-pc-linux-gnu

locale:
LC_CTYPE=C;LC_NUMERIC=C;LC_TIME=C;LC_COLLATE=C;LC_MONETARY=C;LC_MESSAGES=en_US;LC_PAPER=en_US;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=en_US;LC_IDENTIFICATION=C

attached base packages:
[1] grid      tools     stats     graphics  grDevices utils     datasets
[8] methods   base

other attached packages:
 [1] beadarray_1.5.3    beadarraySNP_1.3.7 quantsmooth_1.3.0  lodplot_1.1
 [5] quantreg_4.06      SparseM_0.73       affy_1.13.9        affyio_1.3.1
 [9] geneplotter_1.13.4 lattice_0.15-11    annotate_1.13.3    Biobase_1.13.19
[13] limma_2.9.5

loaded via a namespace (and not attached):
[1] KernSmooth_2.22-20 RColorBrewer_0.2-3 rcompgen_0.1-13


---
Vince Carey, PhD
Assoc. Prof Med (Biostatistics)
Harvard Medical School
Channing Laboratory - ph 6175252265 fa 6177311541
181 Longwood Ave Boston MA 02115 USA
stvjc at channing.harvard.edu