gpm-brightness-xrandr.c fails to build on sparc, due to a passing a char* as guint*, which doesn't have the right alignment. This is caught by gcc, and result s in a build failure:

cc -DHAVE_CONFIG_H -I. -I.. -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include   -DDBUS_API_SUBJECT_TO_CHANGE -I/usr/include/hal -I/usr/include/dbus-1.0 -I/usr/lib/dbus-1.0/include   -pthread -I/usr/include/dbus-1.0 -I/usr/lib/dbus-1.0/include -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include   -DORBIT2=1 -pthread -I/usr/include/libgnomeui-2.0 -I/usr/include/libart-2.0 -I/usr/include/gconf/2 -I/usr/include/gnome-keyring-1 -I/usr/include/libgnome-2.0 -I/usr/include/libbonoboui-2.0 -I/usr/include/libgnomecanvas-2.0 -I/usr/include/gtk-2.0 -I/usr/include/gnome-vfs-2.0 -I/usr/lib/gnome-vfs-2.0/include -I/usr/include/orbit-2.0 -I/usr/include/dbus-1.0 -I/usr/lib/dbus-1.0/include -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/libbonobo-2.0 -I/usr/include/bonobo-activation-2.0 -I/usr/include/libxml2 -I/usr/include/pango-1.0 -I/usr/include/gail-1.0 -I/usr/include/freetype2 -I/usr/include/atk-1.0 -I/usr/lib/gtk-2.0/include -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/libpng12 -I/usr/include/libglade-2.0 -I/usr/include/libwnck-1.0 -I/usr/include/startup-notification-1.0 -I/usr/include/panel-2.0    -I/usr/include/gtk-2.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/dbus-1.0 -I/usr/lib/dbus-1.0/include -I/usr/lib/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/pango-1.0 -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12    -pthread -I/usr/include/gstreamer-0.10 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/libxml2    -I/usr/include/PolicyKit -I/usr/include/gtk-2.0 -I/usr/include/dbus-1.0 -I/usr/lib/dbus-1.0/include -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/lib/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/pango-1.0 -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12   -DBINDIR=\"/usr/bin\" -DGNOMELOCALEDIR=\""/usr/share/locale"\" -DDATADIR=\"/usr/share\" -DPREFIX=\""/usr"\" -DSYSCONFDIR=\""/etc"\" -DLIBDIR=\""/usr/lib"\" -DVERSION="\"2.24.0\"" -DGPM_DATA=\"/usr/share/gnome-power-manager\" -DEGG_LOG_FILE=\""/gnome-power-manager"\" -I.. -I../libunique -I../libhal-glib -I../libdbus-glib   -Werror -Wcast-align -Wno-uninitialized -Wall -Wformat-security -g -fexceptions  -g -O2 -g -Wall -O2 -c gpm-brightness-xrandr.c
cc1: warnings being treated as errors
gpm-brightness-xrandr.c: In function 'gpm_brightness_xrandr_output_get_internal':
gpm-brightness-xrandr.c:104: error: cast increases required alignment of target type
make[5]: *** [gpm-brightness-xrandr.o] Error 1

Trivial patch attached. Ubuntu carries this for an entire release already, it was just never forwarded upstream, sorry about that.