I have installed it, need to do adjustment because of dependency (removing xfce4-xfapplet-plugin, padevchooser), removing some directory (otherwise it won't let me upgrade thunar).
I don't have flickering GDM, but i have flickering X. First time I enter xfce session, it was fine. Then i try to play around to test the new display config. I uncheck my external monitor and my laptop monitor start to flicker. I killed X, but then it crash without even reloading GDM.
I was forced to restart. upon restart, GDM was fine, but when i enter my session, it is flickering in laptop screen and no output for monitor. Both was fine in GDM, before login. Then I tried setting it up via gnome and then restart 9same reason, try killing X, not comeback), and relogin, my display was mirrored. I will try again later tonight. Most likely not xfce4.8 fault as it was already that way when i tried to fiddle with display in GNOME before.
Additional info, when i enter gnome-control-center and then mouse setting, it is flickering as well. Any idea what cause it?