Created attachment 602719 [details] Logs Description of problem: GDM loading is very slow, often it doesn't appear. Fedora Gnome can be started with a step-by-step boot by 'runlevel 3 + startx'. Then, Gnome-shell has a very high CPU usage. XDM+GNOME or XDM+XFCE works fine. Version-Release number of selected component (if applicable): pulseaudio-gdm-hooks-1.1-9.fc17.x86_64 gnome-shell-extension-common-3.4.0-1.fc17.noarch gdm-3.4.1-3.fc17.x86_64 gnome-shell-extension-user-theme-3.4.0-1.fc17.noarch gnome-shell-3.4.1-5.fc17.x86_64 gnome-shell-extension-cpu-temperature-0-0.7.gite1777e6.fc17.noarch How reproducible: Starting Fedora Gnome. Actual results: Gnome login even impossible only by GDM. Additional info: dmesg,xorg,xsessior-errors,journalctl logs attached