Comment 2 for bug 829099

when using kdm on a freshly updated oneiric amd64 box,

pkexec synaptic fails in a unity session (cannot open display: :0). That means starting it from a launcher/dash icon fails.

Under a kde session synaptic is started with the kde sudo program, so synaptic can be started from the gui with kde destop, but not with unity desktop.

I am far away from the box with both desktops installed now, so i cannot check the contents/existence of the suspected file

/usr/share/polkit-1/actions/com.ubuntu.pkexec.synaptic.policy