Re: [Aspire V5-431] Brightness control visible but does nothing

[Thomas Christensen <christensenthomas@gmail.com>]

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