Comment 8 for bug 1024482

I mean that lightdm triggers something at least in GTK2/3. Even opera's own toolkit which reuses somehow GTK (if u tell it to do so) isn't affected.

I can confirm that about LEFT_PTR also. I can change mouse theme in xfce4 but LEFT_PTR is unchanged.

Also before LightDM there was LXDM. And before that was slim (and qingy ). GDM never was an option since it was overbloated.

and since LightDM uses mouse - it's its job to theme cursor properly and do not taint user space.
lightdm-gtk-greeter.conf -> cursor-name=Obsidian