Ubuntu
xorg package

gnome-display-properties: dual display does not work by default

Bug #221116 reported by Mark Renouf on 2008-04-23

This bug report is a duplicate of: Bug #220563: Useful dual-head configuration requires manual editing of xorg.conf to set Virtual. Edit Remove

Affects		Status	Importance	Assigned to	Milestone
	xorg (Ubuntu)	New	Undecided	Unassigned

Bug Description

Thinkpad T61 - Intel 965 graphics.
Internal LCD and external VGA monitors are detected correctly.

Unable to disable "cloned mode". Settings appear to take affect (reflected in the UI) but both displays remain showing the same image. I am able to enable rotation on either screen.

Testing with 'xrandr' directly gives the following hint:

# xrandr --output VGA --right-of LVDS --auto
xrandr: screen cannot be larger than 1680x1680 (desired size 3360x1050)

Adding the following line to my xorg.conf resolves the issue:

        SubSection "Display"
                Virtual 3360 3360
        EndSubSection

This should be autoconfigured (ideally on demand without requiring restart of X).

Revision history for this message

Brian Murray (brian-murray) wrote on 2008-04-23:

Thank you for taking the time to report this bug and helping to make Ubuntu better. This bug did not have a package associated with it, which is important for ensuring that it gets looked at by the proper developers. You can learn more about finding the right package at https://wiki.ubuntu.com/Bugs/FindRightPackage . I have classified this bug as a bug in gnome-control-center which provides gnome-display-properties.