Same issue on Dell Latitude E5430. Just freshly upgraded from Precise. On Trusty: - Using Fn+key is barely useable. Dimming by very tiny steps, and slow to react (like 10s to get OSD, 10s more to get effect). - Using brightness settings is also slow to react (10s-ish) - Tom Chiverton's trick works instant (i.e. echo 600 | sudo tee /sys/class/backlight/intel_backlight/brightness)
On Precise, I had some latency, but usually hammering the Fn+light key did the job just after a couple of secs. -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-power-manager in Ubuntu. https://bugs.launchpad.net/bugs/847001 Title: Adjusting display brightness is very slow on several Dell laptops To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/847001/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
