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SubjectRe: Dell Vostro 3360 multimedia keys
Date
Hello.

On pondělí 27. listopadu 2017 17:56:07 CET Mario.Limonciello@dell.com wrote:
> > /* snip */
> > Looks like that Dell Vostro 3360 have this meaning for multimedia keys:
> >
> > first key: Mobility Center
> > second key: Dell Support Center
> > third key: Dell Instant Launch Manager
> >
> > (same as other Vostro laptops)
>
>
> As I can tell the "Instant Launch" key is supposed to be emitted
> both via WMI and scan code both.
>
> Can you please check SMBIOS table 0xb1 offset 0x08? This is the misc
> BIOS flags table. It's been used for a few other drivers for other
> purposes
> too. I expect that bit 1 should be set. This should indicate
> that the system supports instant launch manager button. You can use that
> to key off of for deviating behavior.

Is this correct:

[~]$ sudo dmidecode -t 0xb1
# dmidecode 3.1
Getting SMBIOS data from sysfs.
SMBIOS 2.7 present.

Handle 0x003C, DMI type 177, 12 bytes
OEM-specific Type
Header and Data:
B1 0C 3C 00 1A 0E 00 00 01 00 00 00

?

>
> As for why these two keys (first and second) seem to emit the same code,
> keep in mind that these were machines from around the era of Windows Vista.
> Microsoft had allowed applications to register tiles in the "mobility
> center".
> Dell had an application at that time (Quickset) that would receive the WMI
> events and register tiles in the mobility center. So the application could
> then
> know to open up mobility center applet when it needed to from WMI
> request or to launch another application if it needed to.
>
> This has all obviously changed with newer versions of Windows.
>
> I would recommend to have a separate function in dell-wmi driver for when
> you see instant launch key in misc flags table and to allow looking at
> extended buffer for these behaviors.
>
>
> >
> > But do not know what KEY_* are used on other Vostro laptops for those
> > keys. It would be great to use same KEY_*...
>
>
> These first two aren't intended to be generally mapped (as I described
> above).
> I think for Linux you can map them if you desire by my above
> description.
> /* snip */

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