Re: Dell Vostro V131 hotkeys revisited

["Michał Kępień" <kernel@kempniu.pl>]

> Can you try to load wmi.ko with params debug_event=1 and
> debug_dump_wdg=1 if you can see something in dmesg?

I tried that too, to no avail (well, debug_dump_wdg obviously caused the
parsed contents of _WDG to be printed out, but there was only one event
GUID - the one already present in dell-wmi). Even inserting a pr_info()
call at the beginning of acpi_wmi_notify() didn't make a difference.

> Maybe we really need some hack/hook if this is firmware issue...

Probably, but I have no elegant solution (note my lack of kernel and
ACPI expertise, though), only two unholy abominations:

 a) install a GPE 0x17 handler which would imitate the actions taken by
    the NEVT method and also handle any additional values which may be
    returned by ECG1; the 0x0400 branch would come out pretty lengthy,
    though,

 b) override the ECG1 method (using ACPI method customization) so that
    it notifies some otherwise unused ACPI device [1] just before it
    returns if an event code not already handled by NEVT is detected;
    then implement a standard notify handler for that device; this
    requires CONFIG_ACPI_CUSTOM_METHOD or installing a precompiled DSDT
    using acpi_install_method(), which would just add to the insanity.

[1] Creating a new one solely for this purpose sounds utterly bonkers.

-- 
Best regards,
Michał Kępień