On my GMA4500 setting brightness to minimum turns off backlight completely, but with external lighting something can still be seen on a screen (because the image is still there, even though there is no backlight). It looks similar to what the reflective cell phone's screen looks like when it goes dark - you can still see symbols on the screen, but you wouldn't be able to see them if you were in a dark environment.
So I believe power manager should not allow setting brightness to absolute minimum. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/568611 Title: Screen brightness control fails on Dell Studio 1558 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
