Possible bug in acpi_video(4)

[Andriy Gapon]

On 28/05/2020 00:34, MrPhyber via freebsd-acpi wrote:
> Hello everyone,
> my laptop is an Acer Swift SF315-41 with an AMD Ryzen 2500U.
> I'm on FreeBSD 12.1-RELEASE-p5 with drm-fbsd12-kmod (amdgpu).
> Everything works on this machine except for the hardware brightness controls.
> On OpenBSD and Linux they work like a charm, and so I think that there is a
> problem in acpi_video(4). I will attach dmesg and acpidump. Whenever I
> try to use the hardware brightness switches, this pops up on
> the system messages: "can't evaluate \_SB_.PCI0.GP17.VGA_.LCD_._BQC - AE_NOT_FOUND". As you will see, FreeBSD sees acpi_video0 only, and this is
> always inactive (sysctl: hw.acpi.video.lcd0.active = 0), but OpenBSD sees acpi_video0, acpi_video1, and others with VGA. Don't know what's the
> matter here, any suggestions?


Please see
 https://svnweb.freebsd.org/base?view=revision&revision=360657
 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=207086

-- 
Andriy Gapon