On Wed, Jan 28, 2009 at 4:24 AM, <[email protected]> wrote: > On Wednesday 07 January 2009 17:51:35 Alex Deucher wrote: >> On Wed, Jan 7, 2009 at 5:35 AM, <[email protected]> wrote: >> > Setup is as follows: T60 Notebook in docking station (display "LVDS" and >> > resolution 1400x1050) and two external displays via DVI (display "DVI-0" >> > and resolution 1280x1024) and VGA (display "VGA-0" and resolution >> > 1280x1024). >> > >> > Goal is to disable the notebook display and have a dualhead on the two >> > external displays. >> > >> > I disabled the LVDS display via "xrandr --output LVDS --off" and tried to >> > enable the external displays in dualhead mode "xrandr --output VGA-0 >> > --left-of DVI-0". Which does not change anything. >> > >> > What can be wrong here? >> >> Both outputs are being driven by the same crtc (controls display >> timing and fb offset). This allows you to drive all three monitors at >> the same time (LVDS on one crtc, DVI/VGA on the other). To run them >> on separate crtcs, specify the crtc with randr. run xrandr --verbose >> to see the crtc assignments. >> xrandr --output LVDS --off >> xrandr --output VGA-0 --crtc 0 --mode 1280x1024 >> xrandr --output DVI-0 --crtc 1 --mode 1280x1024 > > Thanks this did the trick - for one time. With > > xrandr --output LVDS --off && \ > xrandr --output DVI-0 --crtc 0 --mode 1280x1024 && \ > xrandr --output VGA-0 --crtc 1 --mode 1280x1024 && \ > xrandr --output DVI-0 --left-of VGA-0 > > I was able to have a dualhead setup with the two external display. When > switching to the notebook display alone with > > xrandr --output DVI-0 --off && \ > xrandr --output VGA-0 --off && \ > xrandr --output LVDS --crtc 0 --mode 1400x1050 > > the command chain for dualhead set-up results in a buggy set-up. The VGA-0 > display remains dark; I can move the mouse over it and see it but when I try > to move windows over there they are not displayed. The output "xrandr -- > verbose" of the first dualhead and the second dualhead set-up are absolute the > same.
randr may not deal well with having all outputs disabled. try: xrandr --output DVI-0 --off xrandr --output LVDS --crtc 0 --mode 1400x1050 xrandr --output VGA-0 --off Alex _______________________________________________ xorg-driver-ati mailing list [email protected] http://lists.x.org/mailman/listinfo/xorg-driver-ati
