Michaël, it should be, unless ubuntu has patched it out or something daft like that :-) You won't get the indicator if you do not get events for brightness exposed through DBUS, which depends very heavily on your laptop vendor. Things should get more sane soon when ACPI depends on the input layer directly. Try dbus-monitor --system and press the key a few times.
Richard. -- brightness is not associated with any graphical indicator (such as volume one) https://launchpad.net/bugs/29527 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs