On Wed, Jan 15, 2014 at 11:28:23AM +0800, Aaron Lu wrote: > 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. opened as https://bugzilla.kernel.org/show_bug.cgi?id=68751 let me know if I can be of further assistance. Thanks, Thomas -- 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