RE: keyboard backlight max_brightness bug on Dell Latitude E6410

From: Mario.Limonciello
Date: Mon Oct 02 2017 - 09:06:53 EST

> -----Original Message-----
> From: Pali RohÃr [mailto:pali.rohar@xxxxxxxxx]
> Sent: Monday, October 2, 2017 6:53 AM
> To: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
> Cc: Gabriel M. Elder <gabriel@xxxxxxxxxxxxxx>; Gabriele Mazzotta
> <gabriele.mzt@xxxxxxxxx>; Limonciello, Mario <Mario_Limonciello@xxxxxxxx>;
> Darren Hart <dvhart@xxxxxxxxxxxxx>; Andy Shevchenko <andy@xxxxxxxxxxxxx>;
> platform-driver-x86@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx
> Subject: Re: keyboard backlight max_brightness bug on Dell Latitude E6410
> On Friday 29 September 2017 18:19:59 Andy Shevchenko wrote:
> > >> FYI, latest update and info relating to
> > >>
> >
> > Quick solution is to apply DMI to that.
> It is only the Dell Latitude E6410 affected?
> Mario, do you have any information about that API from Dell?
> --
> Pali RohÃr
> pali.rohar@xxxxxxxxx


I believe this particular API shouldn't have changed over generations, so it's
likely something that needs to be quirked for that generation.
I haven't had a chance to check on this yet in detail though.
For now could you guys quirk this one and if I find out there was something
more systemic we can undo the quirk and do something more broad.