Re: [PATCH] platform/x86: asus-wmi: Fix keyboard brightness cannot be set to 0

[Daniel Drake]

On Tue, Dec 31, 2019 at 2:53 PM Daniel Drake <drake@xxxxxxxxxxxx> wrote:
> Here, writing 0x80 to turn off the keyboard LED will result in an
> additional WRAM(0x9f0, 0) call that was not there before. I think we
> should double check this detail.
>
> Let's see if we can borrow one of the affected models and double check
> this patch there before proceeding. I'll follow up internally.

Asus were unable to find a product sample with the affected behaviour.
They did provide us with one from the list I had made, but with a
newer BIOS version where that behaviour has been eliminated. They also
advised that always setting bit 7 is the way they do it on Windows. So
I don't think we have the opportunity for extra verification, but it
should be safe.

Reviewed-by: Daniel Drake <drake@xxxxxxxxxxxx>