This is definitely a bug, and an important one. Recently I started to suffer from these symptoms too. After starting up the computer and running nautilus (this is important, only after running nautilus), the gnome-settings-daemon process froze up my computer, totally. Disk spinning. It unfroze only after a long time. Very bad experience.
After reading this bug, I finally found the cause. Thumbnails directory. These are my measurements: $ du -sh .thumbnails/ 315M .thumbnails/ $ find .thumbnails/ | wc -l 14648 Time spent with 100% I/O load caused by g-s-d (after starting nautilus): 1min 45sec That means every boot I had to wait 2 more minutes to be able to work with computer. After removing ~/.thumbnails directory the problem is gone. Now my computer works fast again, finally. Gnome-settings-daemon must *not* read all the thumbnails on nautilus start. It must expect there are a lot of them! Note: 'find' command was able to count the thumbnails quickly. But when opening the directory with 'mc', it also took about two minutes. I suppose that g-s-d is doing something similar to mc, like calling 'file' on every file or similar task. That must be fixed (or otherwise g-s-d devs should make sure there are never dozens of thousands of files in that directory). Please increase the priority on this. ** Changed in: gnome-settings-daemon (Ubuntu) Status: Invalid => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/573415 Title: g-s-d uses high disk i/o -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs