Is there a way to force xrandr to re-read current available display modes?

[Łukasz Maśko]

Hello.
I have a Dell laptop, for which I have 2 docking stations (at home and at 
work), both with additional monitor connected. The monitors differ in 
resolution. I do not turn my laptop off, I only suspend it to RAM, when it is 
not used.
Let's consider such scenario: laptop is docked at home. Xrandr shows available 
resolution for external screen properly. I turn off the external output 
(xrandr --output VGA1 --off), then I suspend it, undock and take to work, 
where I dock again to another docking port and wake it up.
The problem is, that the laptop does not re-read the resolution configuration 
then. it shows resolutions from the monitor which I have at home, not at work. 
I think that after the machine wakes up, it gets no "display changed" message, 
which is pretty logical. ButThen The only way I can have the data "fixed" is 
to unplug the monitor physically and plug it back. And I dont like such 
solution, that's not what docking station is for.

Can I somehow make xrandr refresh its readings?
-- 
Łukasz Maśko                                                            _o)
Lukasz.Masko(at)ipipan.waw.pl                                           /\\
Registered Linux User #61028                                           _\_V
Ubuntu: staroafrykańskie słowo oznaczające "Nie umiem zainstalować Debiana"