linux-kernel - RE: keyboard backlight max_brightness bug on Dell Latitude E6410

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Date:   Thu, 14 Sep 2017 06:35:15 -0700
From:   "Gabriel M. Elder" <gabriel@...gnowsys.com>
To:     "Pali Rohár" <pali.rohar@...il.com>
Cc:     dvhart@...radead.org, andy@...radead.org,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: RE: keyboard backlight max_brightness bug on Dell Latitude E6410


output from smbios-keyboard-ctl --info:

Libsmbios version : 2.3.0
smbios-keyboard-ctl version : 2.3.0

 Capabilities of KeyBoard Illumination on your system: 
-------------------------------------------------------------------
 Supported USER Selectable Modes : 
	 Always OFF
	 Auto: ALS- and input-activity-based On; input-activity based Off
	 Auto: Input-activity-based On; input-activity based Off

 Supported Keyboard illumination type :  Backlight

 Supports Keyboard illumination on : 
	Any Keystroke
	Touchpad activity
	Pointing stick

 Can configure Keyboard illumination timeout unit in : 
	Seconds
	Minutes
	Hours

 Supported Keyboard light brightness levels :  10

 Maximum acceptable seconds timeout value   :  255

 Maximum acceptable minutes timeout value   :  255

 Maximum acceptable hours timeout value     :  12

 Maximum acceptable days timeout value      :  0


output from smbios-keyboard-ctl --get-status:

Helper function to print current status of keyboard illumination

 Current status of KeyBoard Illumination setting on your system: 
-------------------------------------------------------------------

 Configured mode state: 
	 Auto: Input-activity-based On; input-activity based Off

 Your Keyboard will illumination on: 
	Any Keystroke
	Touchpad activity
	Pointing stick

 Keyboard illumination timeout has bee set at: 10  Seconds

 Current setting of ALS value that turns the light on or off: 18
 Current ALS Reading : 16
 Current keyboard light level : 9


-------- Original Message --------
Subject: Re: keyboard backlight max_brightness bug on Dell Latitude
E6410
From: Pali Rohár <pali.rohar@...il.com>
Date: Thu, September 14, 2017 3:06 am
To: "Gabriel M. Elder" <gabriel@...gnowsys.com>
Cc: dvhart@...radead.org, andy@...radead.org,
platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org

On Monday 11 September 2017 23:25:27 Gabriel M. Elder wrote:
> Hi all,
> Hans de Goede, one of the upower maintainers, suggested I alert you all to this bug:
> 
> https://bugs.freedesktop.org/show_bug.cgi?id=100041
> 
> and the new one I filed via the kernel bugzilla:
> 
> https://bugzilla.kernel.org/show_bug.cgi?id=196913
> "keyboard backlight max_brightness value outside allowable range on Dell Latitude E6410 laptop"
> 
> Please check it out at your earliest convenience.
> 
> thanks,
> - Gabriel</html>

Hi Gabriel, please avoid sending such html emails to mailing list as it
is hard to read them and also you have a very big chance that email
would be eaten by spam filter or other developers would completely
ignore it...

To debug your problem, can you run smbios-keyboard-ctl tool from the
libsmbios project? https://github.com/dell/libsmbios

We would need output from --info parameter and also from --get-status.

-- 
Pali Rohár
pali.rohar@...il.com