Post-Upgrade issues Fedora 24: Cannot open applications after login, 100% CPU
After Upgrade from F23 via dnf system-upgrade, my computer boots fine to the login screen.
But after logging into any desktop environment (GNOME, Gnome on Wayland, Cinnamon, Xfce) and starting an application (like Settings, Nautilus ...) the CPU-load of it is 100% and my whole session totally freezes. Most often the application windows is not even displayed on the screen. I also noticed, that after login my files on the desktop do not appear. Sometimes, the background image is not shown but instead it's just white.
My mouse can be moved all the time. Sometimes after starting an application, I can just see the boundaries of the window and "mutter-dialog" in the title. Not 100% sure, but I think I also noticed some minor scaling issues.
I can log into a terminal session and basically do everything - just the desktop environment does not work anymore.
I don't think gnome-shell crashes, because I am not having any problems when just showing the app drawer, or clicking on the notification header.
After inspecting the Xorg logs, i found that the intel graphics driver is successfully loaded and a display is recognized. I also could not find any hints in the logs from gnome-shell. Kernel log seems fine, too.
Switching to one of the previous install kernels does not change anything.
I am using a Lenovo Thinkpad X1 Carbon 3rd with HidPi display and, when i did the system-upgrade, I had an external monitor connected via the docking station (maybe this is relevant to the issue).
I also tried reinstalling gnome-shell, removing all shell-extentions, and logging into a newly created user account.
Anybody a hint?
LOGS:
Try opening a terminal and running
topas that will tell you what program or programs are using the most CPU. Once we know what's eating up your computing power we can begin to work on correcting it.