I can reproduce this when using the nvidia driver and offloading rendering to it using RandR on an NVIDIA Optimus system. This is what nvidia-prime does and what NVIDIA suggests on their website.
I've assigned the bug report to both the nvidia driver and the modesettings driver since they are both used. The modesettings driver is the one which ultimately deals with RandR (and therefore the gnome- settings-daemon). ** Also affects: xserver-xorg-video-modesetting (Ubuntu) Importance: Undecided Status: New ** Also affects: nvidia-graphics-drivers-319 (Ubuntu) Importance: Undecided Status: New ** Changed in: nvidia-graphics-drivers-319 (Ubuntu) Status: New => Triaged ** Changed in: xserver-xorg-video-modesetting (Ubuntu) Status: New => Triaged ** Changed in: gnome-settings-daemon (Ubuntu) Status: Confirmed => Invalid ** Changed in: nvidia-graphics-drivers-319 (Ubuntu) Importance: Undecided => Medium ** Changed in: xserver-xorg-video-modesetting (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-modesetting in Ubuntu. https://bugs.launchpad.net/bugs/1224254 Title: xrandr Xerrors with the nvidia binary drivers To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/1224254/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp