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

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Date:   Thu, 17 Nov 2016 15:41:34 +0100
From:   Takashi Iwai <tiwai@...e.de>
To:     Pali Rohár <pali.rohar@...il.com>
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 Thu, 17 Nov 2016 15:20:25 +0100,
Pali Rohár wrote:
> 
> 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...

FYI, I found one there and now put my comment:
   https://github.com/dell/libsmbios/issues/3


Takashi