Bug#692361: ACPI display backlight brightness is set to zero at every boot-up (HP Folio 13-2000)

[Jonathan Nieder <jrnieder@gmail.com>]

tags 692361 - fixed-upstream
quit

Hi Stefan,

Stefan Nagy wrote:

> However, this bug was fixed upstream. I tested the patch on top of
> kernel v3.2.32-1 and it fixes the problem.
[...]
> From: Zhang Rui <rui.zhang@intel.com>
> Date: Sun, 2 Dec 2012 10:00:41 +0800
> Subject: [PATCH] ACPI video: ignore BIOS initial backlight value for HP Folio
>  13-2000.
>
> Or else the laptop will boot with a dimmed screen.
>
> Signed-off-by: Zhang Rui <rui.zhang@intel.com>
> ---
>  drivers/acpi/video.c |   14 ++++++++++++++
>  1 file changed, 14 insertions(+)

This patch does not seem to be part of linux-next nor in lenb's tree,
unfortunately.  Please let us know when it is accepted upstream.

Based on <https://bugs.launchpad.net/bugs/1066211> I fear we haven't
gotten to the bottom of this, since the quirk table entry only applies
to your model whereas a fundamental fix would apply to all affected
ones.

Thanks,
Jonathan