linux-kernel - Re: "Setting old previous keyboard state failed" error on Dell E7270

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Date:   Thu, 17 Nov 2016 15:20:25 +0100
From:   Pali Rohár <pali.rohar@...il.com>
To:     Takashi Iwai <tiwai@...e.de>
Cc:     Matthew Garrett <mjg59@...f.ucam.org>,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
        gabriele.mzt@...il.com
Subject: Re: "Setting old previous keyboard state failed" error on Dell E7270

On Thursday 17 November 2016 15:13:59 Takashi Iwai wrote:
> On Thu, 17 Nov 2016 14:21:23 +0100,
> 
> Takashi Iwai wrote:
> > On Thu, 17 Nov 2016 13:19:16 +0100,
> > 
> > Pali Rohár wrote:
> > > Anyway, keyboard backlight control in kernel is implemented from
> > > program smbios-keyboard-ctl provided and supported by Dell. I do
> > > not see any update to that program in upstream git repository.
> > > 
> > > http://github.com/dell/libsmbios/blob/master/src/bin/smbios-keybo
> > > ard-ctl
> > 
> > I'll give it a try shortly later.
> 
> Tried the latest git version now, and it didn't work.
> At setting the mode via smbios-keyboard-ctl --set-mode, it always
> return an error like:
> 
>   Set Trigger Failed. Failed to write config
> 	 Error Return Code : cbRES1: 0x-2 cbRES2: 0xA000000 cbRES3: 0x0
> 
> The error code is same no matter which mode is to set.
...
> > > 2) smbios-keyboard-ctl is not working too -- in this case please
> > > report bug to that libsmbios project and Dell needs to fix it
> 
> So the latter case.
> I'm going to ping smbios maintainer.

Ok. Ideally also open public bug report on github tracker so other 
people can find some information about it...

-- 
Pali Rohár
pali.rohar@...il.com

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