ATI Radeon HD 5600?

[vr <debian-user@iotk.net>]

I just picked up a laptop that has that display adapter.
lspci:
01:00.0 VGA compatible controller: ATI Technologies Inc Redwood [Radeon HD
5600 Series]


The highest resolution I've been able to get so far is 1400x1040 but using
the VESA driver.
xrandr:
Screen 0: minimum 800 x 600, current 1400 x 1050, maximum 1400 x 1050
default connected 1400x1050+0+0 0mm x 0mm
   1400x1050      60.0* 
   1280x1024      61.0  
   1280x960       61.0  
   1152x864       60.0  
   1024x768       61.0  
   800x600        61.0


I've tried to install the ATI driver from AMD's website but when I specify
fglrx in xorg.conf X doesn't launch, but the module loads.
dmesg | grep fglrx
[   12.403952] [fglrx] module loaded - fglrx 8.71.4 [Mar  2 2010] with 1
minors

lsmod | grep fglrx
fglrx                2236840  0 

Does anyone have one of these working @ 1920x1080 resolution?
Or maybe offer some pointers to help me get up to 1920x1080?

thanks!