[R] X11 font troubles (Knoppix/Debian unstable)

[Ben Bolker]

  I'm getting

Error in strwidth(...) : X11 font at size 15 could not be loaded

 kinds of errors when I try to change cex to something *other*
than 1 (works OK otherwise).

  I can't get through to RSiteSearch() right now, but as I recall
my search of it only revealed people who had problems because they
had failed to install fonts: my Knoppix/tracking Debian unstable
distribution claims that the most recent versions of
xfonts-100dpi and xfonts-75dpi are
both installed. (version 1:1.0.0-2)  I'm using the Xorg version
of X11.


xset -q says:

/usr/X11R6/lib/X11/fonts/misc:unscaled,/usr/X11R6/lib/X11/fonts/misc,/usr/X11R6/lib/X11/fonts/75dpi:unscaled,
/usr/X11R6/lib/X11/fonts/75dpi,/usr/X11R6/lib/X11/fonts/100dpi:unscaled,/usr/X11R6/lib/X11/fonts/100dpi,
/usr/X11R6/lib/X11/fonts/Speedo,/usr/X11R6/lib/X11/fonts/Type1,/usr/share/fonts/ttf/western,
/usr/share/fonts/ttf/decoratives,/usr/share/fonts/truetype/ttf-bitstream-vera,/usr/share/fonts/latex-ttf-fonts,
/usr/share/fonts/X11/misc/,/usr/share/fonts/X11/Type1/,/usr/share/fonts/X11/100dpi/,/usr/share/fonts/X11/75dpi

  I haven't noticed any other applications on my system having
problems finding fonts, not that that's a very strong test.

  Any ideas about where to start looking/diagnosing?

  thanks
    Ben Bolker