On 01/14/2014 06:02 PM, Thomas Christensen wrote: > This laptop gets a /sys/class/backlight/acpi_video0 entry for > backlight that is not working. > > $ ls /sys/class/backlight > acpi_video0 intel_backlight > > and I see the following entry in the kernel log: > > [ 19.515016] acer_wmi: Brightness must be controlled by acpi video driver > > By using 'acpi_backlight=vendor' my desktop starts to work. Please file a bug to kernel bugzilla: https://bugzilla.kernel.org/ Choose ACPI/Power-Video, and attach your acpidump there. Thanks, Aaron -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html