Most likely a graphics driver is failing to load or there was some kernel change.
Please run: lspci -k > lspci.txt journalctl -b0 > journal.txt dpkg -l > packages.txt and attach the resulting text files here. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-settings-daemon in Ubuntu. https://bugs.launchpad.net/bugs/2082162 Title: after updating , brightness is not working Status in gnome-settings-daemon package in Ubuntu: Incomplete Status in update-manager package in Ubuntu: Invalid Bug description: i updated my laptop after finishing the update , the brightness is not working brightness of screen is very high and i am not able to down the screen brightness To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/2082162/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp