I can confirm I see this as well on my IBM x40 laptop. When it occurs I cannot get brightness above the lowest level. When I push "brightness up" (Fn + Home) brightness increase for a second then automatically returns back to lowest brightness almost at once. The indicator (brightness level) which Gnome displays on the screen on to of all applications shows the correct value. It shows the increase of for a moment then returns the indicator to zero.
When I cange power state (pulling AC or connecting AC) for the next "brightness up" presses it behaves a bit different. The number of presses this goes on varies but it always comes back to the above behaivor. Here is what happens: 1. time I press brightness up the brightness increase one level and stays there thought the indicator on the screen shows level zero 2. time I press brightness up the brughtness decrease but the indicator on the screen now increase. >From here the behaivor just loops between the two states until it suddenly >goes back to staying on brightness zero (including the indicator) and only >increase for a moment and then automatically decrease again. Brightness down allways works as expected :) -- Laptop brightness on battery power doesnt work https://bugs.launchpad.net/bugs/136693 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
