Wrong display manager resolution

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https://bbs.archlinux.org – Hi!I installed Arch with LXDE as desktop environment and LXDM as display manager (as I did on two other machines before with perfect result).Strangely enough, on this machine the screen resolution was not set automatically to the monitor's default (I am using the xf86-video-nouveau driver for my mx440 nvidia card). But chosing "default" in LXDE for the resolution changed it successfully from 1024x768 to 1680x1050 (so the native screen resolution is recognized, if not set, automatically). But LXDM or rather its login screen still comes in 1024x768 and looks aweful.I suspected an (HowTos)