Re: dell_smbios in 4.15 and keyboard backlight

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On Fri, 2018-02-23 at 19:53 +0000, Mario.Limonciello@xxxxxxxx wrote:

> > > Marco (CC'ed) privately emailed Pali and I to discuss an issue
> > > that
> > > dell-laptop
> > > wasn't working properly for him and dell-smbios couldn't find a
> > > backend.
> > > 
> > > I thought at first it was an issue of the race condition recently
> > > discussed but
> > > it's actually a case that the distro kernel he's using compiled:
> > > 
> > > DELL_SMBIOS
> > > DELL_LAPTOP
> > > 
> > > But didn't select DELL_SMBIOS_WMI or DELL_SMBIOS_SMM.
> > 
> > Distros have to enable whatever they want to.
> 
> At least in this instance I'd hypothesize it's because these are new
> config
> options that default to off.
> 
> They probably had DELL_SMBIOS enabled before and carried that forward
> But there was nothing to transition them to make them turn on 
> DELL_SMBIOS_WMI or DELL_SMBIOS_SMM.

So, the driver requires now _at least_ one of the backend enabled?

> > Can it be the Dell model, that survives w/o one of above or even
> > both?
> 
> The design as it exists to day is that dell-laptop needs dell-smbios
> but
> dell-smbios won't run unless it has a backend selected.

How was it before?

> Something like this maybe then to not let them even try to run dell-
> smbios?

Wouldn't be a regression still?

P.S. See also the link I answered with to Pali.

-- 
Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Intel Finland Oy



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