On 5/23/22 00:37, Emmanuel Vadot wrote:
On Sun, 22 May 2022 09:08:12 -0700
Pete Wright <p...@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
p...@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.
yea that's why i was confused, i investigated acpi_video changes and
didn't see anything obvious.
before i started trying to bisect recent acpi changes i thought it would
be a good idea to test the drm-54-kmod port, which restored that sysctl
knob. sounds like i should continue to try to bisect the acpi kernel
changes under 5.10 and see what i can find though.
cheers,
-p
--
Pete Wright
p...@nomadlogic.org
@nomadlogicLA
