Making Fedora work with laptops on docking station with external monitor

[Matthew Garrett]

On Wed, Oct 27, 2010 at 02:18:16PM -0400, Fulko Hew wrote:
>    I thought I'd try to ask, because if some Linux developer could tell me
>    how/where
>    some app like xrandr gets the data, then I could figure out how to
>    accomplish
>    it on my equivalent system.

xrandr gets it from the X server, and on modern systems the X server 
gets it from sysfs. On pre-KMS hardware it's handled by the 
device-specific code in the X server knowing how to bang the gpu 
registers to do i2c. If you've got control of your kernel then the sane 
thing to do is to add kernel support, but otherwise dig through the i2c 
code in the X server.

-- 
Matthew Garrett | mjg59 at srcf.ucam.org