None that I've ever touched myself - I believe changing drivers tries to edit it. Here's how it looks like for me right now:
$ ls /etc/X11 | grep xorg.conf xorg.conf.07212014 xorg.conf.07242014 xorg.conf.07252014 xorg.conf.07312014 xorg.conf.08062014 xorg.conf.10222014 xorg.conf.11052014 xorg.conf.11072014 xorg.conf.11082014 xorg.conf.11102014 xorg.conf.11112014 xorg.conf-backup-141022083201 xorg.conf-backup-141022085225 xorg.conf-backup-141022085521 xorg.conf-backup-141107125850 xorg.conf-backup-141107130443 xorg.conf-backup-141107130805 xorg.conf-backup-141107140134 xorg.conf-backup-160106082034 xorg.conf.failsafe xorg.conf.original-0 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1528422 Title: Additional drivers reports the wrong driver in use To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/software-properties/+bug/1528422/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
