> Are you using the free driver or the AMD proprietary one? On the laptop is only free driver supplied with kernel 3.19. > If you press the brightness keys, do you get a notification bubble for that > which shows the current value? Yes, a notice displayed on the current value of the brightness of the screen
grep -r. / sys / class / backlight / * / sys / class / backlight / radeon_bl0 / type: raw / sys / class / backlight / radeon_bl0 / brightness: 0 / sys / class / backlight / radeon_bl0 / power / control: auto / sys / class / backlight / radeon_bl0 / power / async: disabled / sys / class / backlight / radeon_bl0 / power / runtime_enabled: disabled / sys / class / backlight / radeon_bl0 / power / runtime_active_kids: 0 / sys / class / backlight / radeon_bl0 / power / runtime_active_time: 0 grep: / sys / class / backlight / radeon_bl0 / power / autosuspend_delay_ms: Input/Output error / sys / class / backlight / radeon_bl0 / power / runtime_status: unsupported / sys / class / backlight / radeon_bl0 / power / runtime_usage: 0 / sys / class / backlight / radeon_bl0 / power / runtime_suspended_time: 0 / sys / class / backlight / radeon_bl0 / bl_power: 0 / sys / class / backlight / radeon_bl0 / max_brightness: 255 / sys / class / backlight / radeon_bl0 / actual_brightness: 0 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1450044 Title: On laptop on card AMD, screen brightness backlight isn't memorized between sessions (systemd-backlight) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1450044/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
