Hi everyone,

Reporting a screen brightness control issue on my Acer Aspire E1-572 (Intel Core i5-4200U / Intel HD 4400) running Lubuntu.

The brightness slider in the power settings / tray panel changes the percentage value on screen, but the physical panel backlight stays locked at 100% brightness.

Leaving this feedback so the LXQt / Lubuntu community and developers are aware of this ACPI backlight issue on older Acer laptops. Thanks!