Re: no hw.acpi.video.lcd0 with graphics/drm-510-kmod

From: Emmanuel Vadot <manu_at_bidouilliste.com>
Date: Mon, 23 May 2022 07:37:45 UTC 
On Sun, 22 May 2022 09:08:12 -0700
Pete Wright <pete@nomadlogic.org> wrote:

> hello,
> i have a lenovo P43s laptop running current.  i've noticed that since 
> graphics/drm-510-kmod became available hw.acpi.video.lcd0 ceases to 
> exist (which makes it impossible to adjust screen brightness).  i've 
> installed graphics/drm-54-kmod and things work as expected.  previously 
> i was running drm-devel-kmod without issues, so i think it's probably an 
> issue with the 5.10 driver?
> 
> i can file a bug report for this (or just test out patches here if 
> that's easier), but wanted to see if anyone here had observed this on 
> other laptops first.
> 
> cheers,
> -pete
> 
> -- 
> Pete Wright
> pete@nomadlogic.org
> @nomadlogicLA
> 
> 

 Not sure what's happening as this sysctl is exposed by acpi_video(4)
and not related to drm.
 But you shouldn't need this, backlight(8) should work everywhere once
drm is loaded.

 Cheers,

-- 
Emmanuel Vadot <manu@bidouilliste.com> <manu@FreeBSD.org>