My xorg.conf has "Configured Monitor" as opposed to "Generic Monitor". Here
is the relevant portion of my xorg.conf:

Section "Device"
    Identifier    "Intel Corporation Mobile 945GM/GMS, 943/940GML Express
Integrated Graphics Controller (rev 03)"
    Driver        "intel"
EndSection

Section "Monitor"
    Identifier    "Configured Monitor"
EndSection

Section "Screen"
    Identifier    "Default Screen"
    Monitor        "Configured Monitor"
    Device        "00:02.0 VGA compatible controller: Intel Corporation Mo
bile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03)
"
EndSection

Section "ServerLayout"
    Identifier    "Default Layout"
    Screen        "Default Screen"
    InputDevice    "Synaptics Touchpad"
EndSection

If this doesn't work and you want to dig deeper:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/221179


2008/11/15 john polo <jpolo@mail.usf.edu>

> megha patnaik wrote:
> > Hi John,
> > an R problem, but an X11 bug in Ubuntu. This is evident from
> plot(rnorm(10))
> > failing to perform. If you are seeing this, then it is because X11
> does not
> > automatically detect Intel graphic cards. The solution is to edit your
> > xorg.conf file, changing it to something like (this is from my
> xorg.conf):
> >
> > Section "Device"
> >     Identifier    "Intel Corporation Mobile 945GM/GMS, 943/940GML Express
> > Integrated Graphics Controller (rev 03)"
> >     Driver        "intel"
> > EndSection
> Megha, thanks for your help.
> i tried "plot(rnorm(10))" and still was not able to see a plot. i
> checked /etc/X11/xorg.conf and it looks like this, without me editing it:
> Section "Device"
>        Identifier      "Intel Corporation Mobile 945GM/GMS, 943/940GML
> Express Integrated Graphics Controller"
>         Driver          "intel"
>        BusID           "PCI:0:2:0"
> EndSection
>
> Section "Monitor"
>        Identifier      "Generic Monitor"
>        Option          "DPMS"
> EndSection
>
> Section "Screen"
>        Identifier      "Default Screen"
>        Device          "Intel Corporation Mobile 945GM/GMS, 943/940GML
> Express Integrated Graphics Controller"
>        Monitor         "Generic Monitor"
>        DefaultDepth    24
>        SubSection "Display"
>                Modes           "1280x800"
>        EndSubSection
> EndSection
>
> > The steps I carried out to detect where the problem was were as follows:
> > 1. Checked whether basic plots in R worked
> > 2. Created a new UID ( which did not have my saved settings in R) and
> tried
> > basic plots.
> >
> > If 2. told me that margins were too large, then this was not a problem
> due
> > to my past commands in R.
> i have tried your suggested plot and the one from the tutorial. neither
> worked. i'm using R 2.6.2 straight from the install through Unbuntu's
> package manager, so i don't think there are any scripts or whathaveyou
> on start.
>
> > xorg.conf is a dangerous file to meddle with. The other symptoms I was
> > seeing of poor graphics was an XL font size on my login screen and broken
> > images in google earth. Are you seeing anything of the sort?
> yes, actually i do get the large fonts at start up like you do. i tried
> trolling around the Ubuntu forums for stuff about video settings, but
> only briefly.
>
> > I am relatively new to the mailing list. Do tell me if this is better
> taken
> > offline.
> i'm kind of new too. maybe someone else will tell me(us) to take this
> somewhere else.
>
> Peter Dalgaard wrote:
> > Good advice in general, but in this case I think John is right in
> assuming that the issue is mainly with his graphics hardware setup, and
> he did tell us about that. The R version would have >been nice though;
> we have fixed various issues in this area over time.
> thank you Peter. i appreciate you assistance. it's version 2.6.2
>
> > According to your setup, the system should believe that you have an
> >~8 inch screen (800/96) and >the default X11 window is 7x7 inches so
> >there _should_ be plenty of room, but some systems try >to outsmart
> >the user and use the actual physical dimensions, which could be
> >smaller (higher >DPI).  You might want to check with "xdpyinfo" (from
> >the shell).
> from xdpyinfo:
> screen #0:
>  dimensions:    1280x800 pixels (289x21 millimeters)
>  resolution:    112x968 dots per inch
>
> > In any case, you can try reducing width, height, and (especially)
> pointsize in the call to x11() (which >you'd issue _before_ the plot()).
> Or >set them with X11.options().
> i tried playing with plot(),halving (and again) the w,h, and pointsize,
> to no avail. and help.search("X11.options") reveals nothing.
>
>

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