Using radeonhd, I get this.. not sure if it's the same bug

 sudo gnome-settings-daemon
** (gnome-settings-daemon:11797): DEBUG: Successfully connected to D-Bus
** (gnome-settings-daemon:11797): DEBUG: Starting settings manager
** (gnome-settings-daemon:11797): DEBUG: Loading settings plugins from dir: /usr/lib/gnome-settings-daemon-2.0/
** (gnome-settings-daemon:11797): DEBUG: Loading plugin: /usr/lib/gnome-settings-daemon-2.0/xrdb.gnome-settings-plugin
** (gnome-settings-daemon:11797): DEBUG: Monitoring dir /apps/gnome_settings_daemon/plugins/xrdb for changes
** (gnome-settings-daemon:11797): DEBUG: Loading plugin: /usr/lib/gnome-settings-daemon-2.0/keyboard.gnome-settings-plugin
** (gnome-settings-daemon:11797): DEBUG: Monitoring dir /apps/gnome_settings_daemon/plugins/keyboard for changes
** (gnome-settings-daemon:11797): DEBUG: Loading plugin: /usr/lib/gnome-settings-daemon-2.0/a11y-keyboard.gnome-settings-plugin
** (gnome-settings-daemon:11797): DEBUG: Monitoring dir /apps/gnome_settings_daemon/plugins/a11y-keyboard for changes
** (gnome-settings-daemon:11797): DEBUG: Loading plugin: /usr/lib/gnome-settings-daemon-2.0/sound.gnome-settings-plugin
** (gnome-settings-daemon:11797): DEBUG: Monitoring dir /apps/gnome_settings_daemon/plugins/sound for changes
** (gnome-settings-daemon:11797): DEBUG: Loading plugin: /usr/lib/gnome-settings-daemon-2.0/keybindings.gnome-settings-plugin
** (gnome-settings-daemon:11797): DEBUG: Monitoring dir /apps/gnome_settings_daemon/plugins/keybindings for changes
** (gnome-settings-daemon:11797): DEBUG: Loading plugin: /usr/lib/gnome-settings-daemon-2.0/background.gnome-settings-plugin
** (gnome-settings-daemon:11797): DEBUG: Monitoring dir /apps/gnome_settings_daemon/plugins/background for changes
** (gnome-settings-daemon:11797): DEBUG: Loading plugin: /usr/lib/gnome-settings-daemon-2.0/dummy.gnome-settings-plugin
** (gnome-settings-daemon:11797): DEBUG: Monitoring dir /apps/gnome_settings_daemon/plugins/dummy for changes
** (gnome-settings-daemon:11797): DEBUG: Loading plugin: /usr/lib/gnome-settings-daemon-2.0/xrandr.gnome-settings-plugin
** (gnome-settings-daemon:11797): DEBUG: Monitoring dir /apps/gnome_settings_daemon/plugins/xrandr for changes
** (gnome-settings-daemon:11797): DEBUG: Loading plugin: /usr/lib/gnome-settings-daemon-2.0/clipboard.gnome-settings-plugin
** (gnome-settings-daemon:11797): DEBUG: Monitoring dir /apps/gnome_settings_daemon/plugins/clipboard for changes
** (gnome-settings-daemon:11797): DEBUG: Loading plugin: /usr/lib/gnome-settings-daemon-2.0/xsettings.gnome-settings-plugin
** (gnome-settings-daemon:11797): DEBUG: Monitoring dir /apps/gnome_settings_daemon/plugins/xsettings for changes
** (gnome-settings-daemon:11797): DEBUG: Loading plugin: /usr/lib/gnome-settings-daemon-2.0/mouse.gnome-settings-plugin
** (gnome-settings-daemon:11797): DEBUG: Monitoring dir /apps/gnome_settings_daemon/plugins/mouse for changes
** (gnome-settings-daemon:11797): DEBUG: Loading plugin: /usr/lib/gnome-settings-daemon-2.0/typing-break.gnome-settings-plugin
** (gnome-settings-daemon:11797): DEBUG: Monitoring dir /apps/gnome_settings_daemon/plugins/typing-break for changes
** (gnome-settings-daemon:11797): DEBUG: Loading plugin: /usr/lib/gnome-settings-daemon-2.0/font.gnome-settings-plugin
** (gnome-settings-daemon:11797): DEBUG: Monitoring dir /apps/gnome_settings_daemon/plugins/font for changes
** (gnome-settings-daemon:11797): DEBUG: Loading plugin: /usr/lib/gnome-settings-daemon-2.0/media-keys.gnome-settings-plugin
** (gnome-settings-daemon:11797): DEBUG: Monitoring dir /apps/gnome_settings_daemon/plugins/media-keys for changes
** (gnome-settings-daemon:11797): DEBUG: Loading plugin: /usr/lib/gnome-settings-daemon-2.0/screensaver.gnome-settings-plugin
** (gnome-settings-daemon:11797): DEBUG: Monitoring dir /apps/gnome_settings_daemon/plugins/screensaver for changes
** (gnome-settings-daemon:11797): DEBUG: GnomeSettingsModule 0x807ee00 initialising
** (gnome-settings-daemon:11797): DEBUG: Loading /usr/lib/gnome-settings-daemon-2.0/libxrandr.so
** (gnome-settings-daemon:11797): DEBUG: Registering GsdXrandrPlugin
** (gnome-settings-daemon:11797): DEBUG: Creating object of type GsdXrandrPlugin
** (gnome-settings-daemon:11797): DEBUG: GsdXrandrPlugin initializing
** (gnome-settings-daemon:11797): DEBUG: Activating xrandr plugin
** (gnome-settings-daemon:11797): DEBUG: Starting xrandr manager
Resource Timestamp: 666084
Resource Configuration Timestamp: 666084
CRTC 41 Timestamp: 666084
CRTC 42 Timestamp: 666084
Output 43 Timestamp: 666084
Segmentation fault (core dumped)