Re: Thinkpad buttons do not work on X250 + T550 (NetBSD 9.1 + 9.2)

[nia <nia%NetBSD.org@localhost>]

On Sat, May 29, 2021 at 01:37:42PM +1000, matthew green wrote:
> > The Thinkpad buttons on the Thinpads X250 and T550 to adjust audio and backlight do not seem to be working. I have tested this under NetBSD 9.1. and 9.2 on both of those machines, using LXQT and/or XFCE as a desktop environment. 
> >
> > Is this feature currently unsupported?
> 
> there is a newer acpi thinkpad method that the current driver
> does not support.  the "LEN0268" device is missing support.
> 
> i never got anywhere closer than noticing this was the problem.
> 
> 
> .mrg.

Actually, on the X250 the problems lie elsewhere.

The audio buttons work - in the tty. In X11 you have to configure
them yourself. This is normal on NetBSD.

The brightness buttons were (I believe) broken by the 9.0 drmkms
update, someone forgot to reimplement the right bits.

The keypresses are detected in the kernel but it cannot adjust
the backlight without aid from intel_backlight from pkgsrc.