change color depth to 16bit

[Pablo Sánchez <pablos@adinet.com.uy>]

Hi , running wheezy/amd64 here, on a compaq 6820S .

Xorg.log tells video card is "RADEON(0): Chipset: "ATI Mobility Radeon X1350" (ChipID = 0x7196) "
and using xserver-xorg-video-radeon package .

I have an external monitor, with a 1920x1080 display geometry and the laptop monitor is 1440x900 .

I'd like to use both , but the virtual resolution on 24bit color is "short on resources".

I cannot find (at least on xrandr) how to change from 24bit to 16 bit .
Should i go through an xorg.conf file ? or fbset ? ...

On squeeze I got this working, just dropping color depth .

Any help, is welcome .

Regards .

Pablo