Comment 11 for bug 874241

Still affecting Precise.

Running Precise Beta updated (Unity as default Desktop) on a Dell XPS 15 L502X attached to an external Monitor (1920X1080) through the miniDP (DVI) port.

Same symptoms:

- At the greeter stage:
--> the laptop screen has correct resolution but is truncated from left and right sides (exactly like screenshot).
- -> the external monitor screen displays a mirror of the laptop screen (gretter) with low resolution but is not truncated.

- At the login stage (user session):
--> Everything works fine for both monitors and extended desktop.

I have also installed other DM on the system (XCFE, Gnome classic and KDE). Yet, the primary manager is Unity (Lightdm).
When booting, the two screens display at correct resolution the KUBUNTU logo (mirror), and once at the greeter stage, the configuration seems to be modified.

If you need me to undergo other tests please feel free to ask.