ore details in command line In addition to the brightness slider, the following command also reports maximum brightness while the screen is dim: cat /sys/class/backlight/acpi_video0/brightness
Typing this command fixes brightness immediately: echo 50 | sudo tee /sys/class/backlight/acpi_video0/brightness To sum up The value returned by `cat /sys/class/backlight/acpi_video0/brightness` is 50 both while the screen is dim before touching a brightness key or setting brightness in the command line and after it when it becomes bright. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to fglrx-installer in Ubuntu. https://bugs.launchpad.net/bugs/1360218 Title: Dim screen until brightness key pressed Status in “fglrx-installer” package in Ubuntu: New Bug description: It is a Lenovo G50-45 laptop with AMD/ATI Radeon APU A4-6000 with R2 Graphics. When I boot up Ubuntu 14.04.1 64 bit using fglrx (or fglrx-updates) 2:13.350.1-0ubuntu2, the screen gets very dim at LightDM and remains dim in Ubuntu desktop until I press one of the two brightness keys or change brightness in System Settings. Even though the screen is dim, the brightness slider in System Settings or the brightness on-screen display shows that brightness is set at the maximum. It does not matter whether I increase or decrease brightness with the function keys or the slider in System Settings, the screen will immediately brighten up after touching the brightness keys or the System Settings slider. No improvement with fglrx 14.100-0ubuntu1 built with ubuntu-amd- catalyst-install 3.9 either. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/fglrx-installer/+bug/1360218/+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
