Date: Mon, 23 May 2022 07:59:07 -0700 From: Pete Wright <pete@nomadlogic.org> To: Emmanuel Vadot <manu@bidouilliste.com> Cc: FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: no hw.acpi.video.lcd0 with graphics/drm-510-kmod Message-ID: <bf384f8d-c1c3-49e6-a5f2-fb54a9360eb8@nomadlogic.org> In-Reply-To: <20220523093745.ab74225307d0ec8981849acd@bidouilliste.com> References: <279458c5-74ce-55ec-9dac-de4a064243a9@nomadlogic.org> <20220523093745.ab74225307d0ec8981849acd@bidouilliste.com>
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On 5/23/22 00:37, Emmanuel Vadot wrote: > 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. 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 pete@nomadlogic.org @nomadlogicLA
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