When I try to change the brightness, it is System Settings -> Brightness & Lock I have identified the package as unity-control-center, not ubuntu docs as I reported erroneously at first. It is not a bug against ubuntu-docs that I know of.
** Package changed: ubuntu-docs (Ubuntu) => unity-control-center (Ubuntu) -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to unity-control-center in Ubuntu. https://bugs.launchpad.net/bugs/1545266 Title: screen brightness slider has no effect Status in unity-control-center package in Ubuntu: Incomplete Bug description: Trusty Tahr 14.04 LTS, seems to be fully updated. The problem is: When I go to System Settings -> Brightness & Lock, the slider has no effect. I can decrease the brightness slider to any level and the actual brightness of the monitors apparently does not change in any way. f.lux also has no effect. Also when i try to do echo 50 | sudo tee /sys/class/backlight/acpi_video0/brightness it has no effect (I learned why i can not do sudo echo 50 > /sys/class/backlight/acpi_video0/brightness, so that is good.) product: OptiPlex 7010 (OptiPlex 7010) *-cpu description: CPU product: Intel(R) Core(TM) i3-3240 CPU @ 3.40GHz *-pci description: Host bridge product: Xeon E3-1200 v2/3rd Gen Core processor DRAM Controller vendor: Intel Corporation *-display description: VGA compatible controller product: Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller I would love to help provide some more help on my dual monitor setup. I found this documentation: https://wiki.ubuntu.com/X/Config/Resolution It says I should run $gnome-display-properties. Seems to be out of date. gnome-display-properties: command not found I guess it would be annoying to say it's a security vulnerability although if my screen isn't dim someone could more easily look through the window and see what I am typing on the screen. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity-control-center/+bug/1545266/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
