I also have this on a Thinkpad T60/87445 bu ( https://wiki.ubuntu.com/LaptopTestingTeam/ThinkpadT60-5BU ) running an up-to-date Gutsy as of 17 July. Using GPM 2.19.5-0ubuntu1.
On AC: If I try to decrease the brightness(fn-End) it does not let me go any more than one step below max.(it goes up but then immediately goes back down) dbus-monitor shows: signal sender=:1.10 -> dest=(null destination) path=/org/freedesktop/PowerManagement/Backlight; interface=org.freedesktop.PowerManagement.Backlight; member=BrightnessChanged uint32 90 signal sender=:1.10 -> dest=(null destination) path=/org/freedesktop/PowerManagement/Backlight; interface=org.freedesktop.PowerManagement.Backlight; member=BrightnessChanged uint32 95 If I try to increase the brightness(fn-Home) it does go to max but the notification box remains on the screen and the CPU experiences about 10% usage due to Xorg, and notification-daemon. dbus-monitor at this point continuously displays: signal sender=:1.10 -> dest=(null destination) path=/org/freedesktop/PowerManagement/Backlight; interface=org.freedesktop.PowerManagement.Backlight; member=BrightnessChanged uint32 100 This will continue until I set the brightness to one step below max.. On battery: When the AC is removed the screen dims.(Ihave it set to cut brightness 75%). If I try to increase the brightness it does not allow it.(it goes up but then immediately goes back down) Now if I set the preferences to dim by only 20% it does not allow me to dim.(same behavior). I can increase it though. The behavior changes depending on the "Dim Display nrightness setting", especially around the 55-70% range. If "Dim Display nrightness setting" is set to where the display will then be set at 100% brighness it gets "stuck" like above. -- lcd brightness down doesn't work when gpm running (t60) https://bugs.launchpad.net/bugs/123548 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
