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
On Monday 11 September 2017 23:25:27 Gabriel M. Elder wrote:
> <html><body><span style="font-family:Verdana; color:#000; font-size:10pt;"><div>Hi all,</div><div><br></div><div>Hans de Goede, one of the upower maintainers, suggested I alert you all to this bug:</div><div><br></div><div><a href="https://bugs.freedesktop.org/show_bug.cgi?id=100041" mce_href="https://bugs.freedesktop.org/show_bug.cgi?id=100041" title="https://bugs.freedesktop.org/show_bug.cgi?id=100041" target="_blank">https://bugs.freedesktop.org/show_bug.cgi?id=100041</a><br></div><div><br></div><div>and the new one I filed via the kernel bugzilla:</div><div><br></div><div><a href="https://bugzilla.kernel.org/show_bug.cgi?id=196913" mce_href="https://bugzilla.kernel.org/show_bug.cgi?id=196913" title="https://bugzilla.kernel.org/show_bug.cgi?id=196913" target="_blank">https://bugzilla.kernel.org/show_bug.cgi?id=196913</a><br></div><div><br></div><div>"<span id="summary_container"><span id="short_desc_nonedit_display">keyboard backlight max_brightness value outside allowable range on Dell Latitude E6410 laptop"</span></span></div><div><br></div><div>Please check it out at your earliest convenience.</div><div><br></div><div>thanks,</div><div>- Gabriel</div></span></body></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
[email protected]
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 <[email protected]>
Date: Thu, September 14, 2017 3:06 am
To: "Gabriel M. Elder" <[email protected]>
Cc: [email protected], [email protected],
[email protected], [email protected]
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
[email protected]
Adding Gabriele to thread, IIRC you have machine which uses
"supported keyboard light brightness levels"
Can you look at this bug, if your machine is affected by it too?
Important parts in ouptput:
> ... --info
> Supported Keyboard light brightness levels : 10
> ... --get-status
> Current keyboard light level : 9
Gabriel, can you play with this tool, which values can be set via
--set-level= parameter? Is 10 accepted? --get-status can be used to
check if value was accepted.
On Thursday 14 September 2017 06:35:15 Gabriel M. Elder wrote:
>
> 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 <[email protected]>
> Date: Thu, September 14, 2017 3:06 am
> To: "Gabriel M. Elder" <[email protected]>
> Cc: [email protected], [email protected],
> [email protected], [email protected]
>
> 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
[email protected]
I've also been updating
https://bugzilla.kernel.org/show_bug.cgi?id=196913 btw.
What source file is responsible for setting this; led-class.c?
I would like to know, so I can tell it to use the correct value:
max_brightness = supported_brightness_levels-1; //
!actual_max_brightness+1 :)
# smbios-keyboard-ctl --set-level=10; echo $?
Old Keyboard illumination level is: 9
Set Trigger Failed. Failed to write config
Error Return Code : cbRES1: 0x-2 cbRES2: 0x93512 cbRES3: 0xCFFFF
0
# smbios-keyboard-ctl --get-status; echo $?
Helper function to print current status of keyboard illumination
Current status of KeyBoard Illumination setting on your system:
-------------------------------------------------------------------
Configured mode state:
Auto: ALS- and input-activity-based On; input-activity based Off
Your Keyboard will illumination on:
Any Keystroke
Touchpad activity
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 : 45
Current keyboard light level : 9
0
-------- Original Message --------
Subject: Re: keyboard backlight max_brightness bug on Dell Latitude
E6410
From: Pali Rohár <[email protected]>
Date: Thu, September 14, 2017 8:54 am
To: "Gabriel M. Elder" <[email protected]>, Gabriele Mazzotta
<[email protected]>
Cc: [email protected], [email protected],
[email protected], [email protected]
Adding Gabriele to thread, IIRC you have machine which uses
"supported keyboard light brightness levels"
Can you look at this bug, if your machine is affected by it too?
Important parts in ouptput:
> ... --info
> Supported Keyboard light brightness levels : 10
> ... --get-status
> Current keyboard light level : 9
Gabriel, can you play with this tool, which values can be set via
--set-level= parameter? Is 10 accepted? --get-status can be used to
check if value was accepted.
On Thursday 14 September 2017 06:35:15 Gabriel M. Elder wrote:
>
> 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 <[email protected]>
> Date: Thu, September 14, 2017 3:06 am
> To: "Gabriel M. Elder" <[email protected]>
> Cc: [email protected], [email protected],
> [email protected], [email protected]
>
> 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
[email protected]
2017-09-14 15:54 GMT+02:00 Pali Rohár <[email protected]>:
> Adding Gabriele to thread, IIRC you have machine which uses
> "supported keyboard light brightness levels"
> Can you look at this bug, if your machine is affected by it too?
My keyboard has two brightness levels + off. The value of
max_brightness is 2, as expected.
Gabriele
Yes, my laptop uses "supported keyboard light brightness levels".
>
> Important parts in ouptput:
>
>> ... --info
>> Supported Keyboard light brightness levels : 10
>
>> ... --get-status
>> Current keyboard light level : 9
>
> Gabriel, can you play with this tool, which values can be set via
> --set-level= parameter? Is 10 accepted? --get-status can be used to
> check if value was accepted.
>
> On Thursday 14 September 2017 06:35:15 Gabriel M. Elder wrote:
>>
>> 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 <[email protected]>
>> Date: Thu, September 14, 2017 3:06 am
>> To: "Gabriel M. Elder" <[email protected]>
>> Cc: [email protected], [email protected],
>> [email protected], [email protected]
>>
>> 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
> [email protected]
On Thursday 14 September 2017 16:33:57 Gabriele Mazzotta wrote:
> 2017-09-14 15:54 GMT+02:00 Pali Rohár <[email protected]>:
> > Adding Gabriele to thread, IIRC you have machine which uses
> > "supported keyboard light brightness levels"
> > Can you look at this bug, if your machine is affected by it too?
>
> My keyboard has two brightness levels + off. The value of
> max_brightness is 2, as expected.
Ah :-(
So you have "Supported Keyboard light brightness levels : 2" and you
can se value 0, 1 or 2.
And Gabriel has "Supported Keyboard light brightness levels : 10" and
can set only values 0..9. But not 10.
Any idea how to solve this situation?
CCing Mario from Dell. Can you recheck what is wrong here? Or why
Dell Latitude E6410 behaves differently?
> Gabriele
>
> Yes, my laptop uses "supported keyboard light brightness levels".
> >
> > Important parts in ouptput:
> >
> >> ... --info
> >> Supported Keyboard light brightness levels : 10
> >
> >> ... --get-status
> >> Current keyboard light level : 9
> >
> > Gabriel, can you play with this tool, which values can be set via
> > --set-level= parameter? Is 10 accepted? --get-status can be used to
> > check if value was accepted.
> >
> > On Thursday 14 September 2017 06:35:15 Gabriel M. Elder wrote:
> >>
> >> 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 <[email protected]>
> >> Date: Thu, September 14, 2017 3:06 am
> >> To: "Gabriel M. Elder" <[email protected]>
> >> Cc: [email protected], [email protected],
> >> [email protected], [email protected]
> >>
> >> 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
> > [email protected]
--
Pali Rohár
[email protected]
FYI, latest update and info relating to
https://bugzilla.kernel.org/show_bug.cgi?id=196913
--- a/drivers/platform/x86/dell-laptop.c
+++ a/drivers/platform/x86/dell-laptop.c
@@ -1217,7 +1217,7 @@ static int kbd_get_info(struct kbd_info *info)
static unsigned int kbd_get_max_level(void)
{
if (kbd_info.levels != 0)
- return kbd_info.levels;
+ return kbd_info.levels - 1;
if (kbd_mode_levels_count > 0)
return kbd_mode_levels_count - 1;
return 0;
Finally had a chance to make this mod, compile and try it out. Based on
my testing, it seems to completely correct the problem.
Upon initially opening the power panel in gnome-control-center, the
keyboard brightness slider is all the way over to the right, where one
would expect it to be, as well as all of the brightness step levels.
Closing the lid, putting it to sleep and waking it back up does not have
the annoying keyboard backlight disabling side-effect that I previously
described.
- Gabriel
-------- Original Message --------
Subject: Re: keyboard backlight max_brightness bug on Dell Latitude
E6410
From: Pali Rohár <[email protected]>
Date: Thu, September 14, 2017 10:25 am
To: Gabriele Mazzotta <[email protected]>, Mario Limonciello
<[email protected]>
Cc: "Gabriel M. Elder" <[email protected]>, Darren Hart
<[email protected]>, [email protected],
"[email protected]"
<[email protected]>, "[email protected]"
<[email protected]>
On Thursday 14 September 2017 16:33:57 Gabriele Mazzotta wrote:
> 2017-09-14 15:54 GMT+02:00 Pali Rohár <[email protected]>:
> > Adding Gabriele to thread, IIRC you have machine which uses
> > "supported keyboard light brightness levels"
> > Can you look at this bug, if your machine is affected by it too?
>
> My keyboard has two brightness levels + off. The value of
> max_brightness is 2, as expected.
Ah :-(
So you have "Supported Keyboard light brightness levels : 2" and you
can se value 0, 1 or 2.
And Gabriel has "Supported Keyboard light brightness levels : 10" and
can set only values 0..9. But not 10.
Any idea how to solve this situation?
CCing Mario from Dell. Can you recheck what is wrong here? Or why
Dell Latitude E6410 behaves differently?
> Gabriele
>
> Yes, my laptop uses "supported keyboard light brightness levels".
> >
> > Important parts in ouptput:
> >
> >> ... --info
> >> Supported Keyboard light brightness levels : 10
> >
> >> ... --get-status
> >> Current keyboard light level : 9
> >
> > Gabriel, can you play with this tool, which values can be set via
> > --set-level= parameter? Is 10 accepted? --get-status can be used to
> > check if value was accepted.
> >
> > On Thursday 14 September 2017 06:35:15 Gabriel M. Elder wrote:
> >>
> >> 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 <[email protected]>
> >> Date: Thu, September 14, 2017 3:06 am
> >> To: "Gabriel M. Elder" <[email protected]>
> >> Cc: [email protected], [email protected],
> >> [email protected], [email protected]
> >>
> >> 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
> > [email protected]
--
Pali Rohár
[email protected]
Yes, that would fix problem for you and break other machines...
On Friday 29 September 2017 07:08:23 Gabriel M. Elder wrote:
> FYI, latest update and info relating to
> https://bugzilla.kernel.org/show_bug.cgi?id=196913
>
>
> --- a/drivers/platform/x86/dell-laptop.c
> +++ a/drivers/platform/x86/dell-laptop.c
> @@ -1217,7 +1217,7 @@ static int kbd_get_info(struct kbd_info *info)
> static unsigned int kbd_get_max_level(void)
> {
> if (kbd_info.levels != 0)
> - return kbd_info.levels;
> + return kbd_info.levels - 1;
> if (kbd_mode_levels_count > 0)
> return kbd_mode_levels_count - 1;
> return 0;
>
>
> Finally had a chance to make this mod, compile and try it out. Based on
> my testing, it seems to completely correct the problem.
>
> Upon initially opening the power panel in gnome-control-center, the
> keyboard brightness slider is all the way over to the right, where one
> would expect it to be, as well as all of the brightness step levels.
> Closing the lid, putting it to sleep and waking it back up does not have
> the annoying keyboard backlight disabling side-effect that I previously
> described.
>
> - Gabriel
>
>
> -------- Original Message --------
> Subject: Re: keyboard backlight max_brightness bug on Dell Latitude
> E6410
> From: Pali Rohár <[email protected]>
> Date: Thu, September 14, 2017 10:25 am
> To: Gabriele Mazzotta <[email protected]>, Mario Limonciello
> <[email protected]>
> Cc: "Gabriel M. Elder" <[email protected]>, Darren Hart
> <[email protected]>, [email protected],
> "[email protected]"
> <[email protected]>, "[email protected]"
> <[email protected]>
>
> On Thursday 14 September 2017 16:33:57 Gabriele Mazzotta wrote:
> > 2017-09-14 15:54 GMT+02:00 Pali Rohár <[email protected]>:
> > > Adding Gabriele to thread, IIRC you have machine which uses
> > > "supported keyboard light brightness levels"
> > > Can you look at this bug, if your machine is affected by it too?
> >
> > My keyboard has two brightness levels + off. The value of
> > max_brightness is 2, as expected.
>
> Ah :-(
>
> So you have "Supported Keyboard light brightness levels : 2" and you
> can se value 0, 1 or 2.
>
> And Gabriel has "Supported Keyboard light brightness levels : 10" and
> can set only values 0..9. But not 10.
>
> Any idea how to solve this situation?
>
> CCing Mario from Dell. Can you recheck what is wrong here? Or why
> Dell Latitude E6410 behaves differently?
>
> > Gabriele
> >
> > Yes, my laptop uses "supported keyboard light brightness levels".
> > >
> > > Important parts in ouptput:
> > >
> > >> ... --info
> > >> Supported Keyboard light brightness levels : 10
> > >
> > >> ... --get-status
> > >> Current keyboard light level : 9
> > >
> > > Gabriel, can you play with this tool, which values can be set via
> > > --set-level= parameter? Is 10 accepted? --get-status can be used to
> > > check if value was accepted.
> > >
> > > On Thursday 14 September 2017 06:35:15 Gabriel M. Elder wrote:
> > >>
> > >> 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 <[email protected]>
> > >> Date: Thu, September 14, 2017 3:06 am
> > >> To: "Gabriel M. Elder" <[email protected]>
> > >> Cc: [email protected], [email protected],
> > >> [email protected], [email protected]
> > >>
> > >> 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
> > > [email protected]
>
--
Pali Rohár
[email protected]
On Fri, Sep 29, 2017 at 5:11 PM, Pali Rohár <[email protected]> wrote:
> Yes, that would fix problem for you and break other machines...
I dunno what happened to you guys to use top-posting...
>> FYI, latest update and info relating to
>> https://bugzilla.kernel.org/show_bug.cgi?id=196913
Quick solution is to apply DMI to that.
--
With Best Regards,
Andy Shevchenko