limited resolution with Intel graphics

limited resolution with Intel graphics

My Dell laptop has an Intel Graphics HD 3000 driving a 1600x900 LCD. However, For some reason, Ubuntu 13.04 won't let me set the resolution above 1024x768. Can anyone offer any advice? Thanks!
$ lshw
<snip>
*-display UNCLAIMED
         description: VGA compatible controller
         product: 2nd Generation Core Processor Family Integrated Graphics Controller
         vendor: Intel Corporation
         physical id: 2
         bus info: pci@0000:00:02.0
         version: 09
         width: 64 bits
         clock: 33MHz
         capabilities: vga_controller cap_list
         configuration: latency=0
         resources: memory:f1400000-f17fffff memory:e0000000-efffffff ioport:5000(size=64)

$ xrandr
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 800 x 600, current 1024 x 768, maximum 1024 x 768
default connected 1024x768+0+0 0mm x 0mm
   1024x768       61.0*
   800x600        61.0