GNOME Bugzilla – Bug 674434
brightness osd does weird things when internal lcd is off
Last modified: 2012-09-03 10:12:36 UTC
Attach an external LCD and turn off the internal LCD (or dock it). Then use the brightness keys on the internal or external keyboard. I don't really expect them to work - or to at least show feedback that there is no change possible. However, what I see is the slider go from zero to one step but no farther. And back to zero if I ask for lowering the brightness.
Hmm, I can reproduce. Debugging now.
commit 3c84744716963c40a649330d8dee07fd28ad26f6 Author: Richard Hughes <richard@hughsie.com> Date: Mon Sep 3 11:10:04 2012 +0100 power: Do not attempt to change the brightness of an output that has been disabled Resolves: https://bugzilla.gnome.org/show_bug.cgi?id=674434