[lkml]   [2011]   [Jun]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH 2/3] ideapad: Add nodes in sysfs
On Thu, Jun 2, 2011 at 12:14 PM, Ike Panhc <> wrote:
> On 06/02/2011 05:48 PM, Corentin Chary wrote:
>> Hi Ike,
>> Why do you want to add /sys/devices/platform/ideapad/brightness and
>>     /sys/devices/platform/ideapad/backlight ?
>> Both of these files should be handled by the generic backlight class
>> (using brightness and bl_power).
> This is within VPC2004. In DSDT they are different device from generic
> backlight.
> and I try bl_power but can not turning off power of whole LCD. No idea
> how screensaver do it, looks like just cut off video signal.

What I wanted to say is that you should use the generic backlight
class (!=driver) to expose these. You can look at asus-wmi.c to see
how it's done.
Then users will be able to choose the backlight implementation using
acpi_backlight=vendor or acpi_backlight=video.

Corentin Chary
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2011-06-02 13:25    [W:0.092 / U:4.968 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site