It appears that many users of the Fedora 24 operating system have reported in the last 24 hours that they are getting “duplicated packages” and “kernel updates not working” errors when attempting to run the “dnf update” command to update their installations with new package versions released through the official software repositories. After some investigation, Mr. Williamson arrived at the conclusion that there’s a bug in the “dnf update” process that causes a graphical desktop environment like GNOME or KDE or the entire X Window System (X11) to crash, but it depends on the hardware configuration or package set installed of the user.