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Date:      Sun, 12 Aug 2018 01:54:24 +0300
From:      Greg V <greg@unrelenting.technology>
To:        Pete Wright <pete@nomadlogic.org>
Cc:        Kevin Oberman <rkoberman@gmail.com>, "freebsd-x11@freebsd.org" <x11@freebsd.org>
Subject:   Re: Clarification on moving to drm-stable-kmod on 11.2
Message-ID:  <1534028064.35460.2@hraggstad.unrelenting.technology>
In-Reply-To: <f3c6ac10-8162-4cc5-96ef-30fdddf7724b@email.android.com>
References:  <1534020277.35460.0@hraggstad.unrelenting.technology> <f3c6ac10-8162-4cc5-96ef-30fdddf7724b@email.android.com>

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On Sun, Aug 12, 2018 at 1:12 AM, Pete Wright <pete@nomadlogic.org>=20
wrote:
>=20
>=20
> On Aug 11, 2018 1:44 PM, Greg V <greg@unrelenting.technology> wrote:
>> On Sat, Aug 11, 2018 at 9:58 PM, Kevin Oberman <rkoberman@gmail.com>
>> wrote:
>> > A while ago I moved to running drm-stable-kmod on my 11.2 system=20
>> and
>> > have
>> > not had any issues, but I am unclear on what, if ny changes are
>> > appropriate
>> > in my loader.conf. I just noticed that the "old" kernel module is
>> > atill
>> > being loaded and I think that is wrong.
>> >
>> > My loader.conf contains:
>> > drm.i915.enable_rc6=3D7
>> > # Enable semaphores
>> > drm.i915.semaphores=3D1
>> > Are these appropriate to drm-stable-kmod? If so, is loader.conf the
>> > proper
>> > place for them?
>>=20
>> Hi,
>>=20
>> These don't work with drm-*-kmod, the new names are:
>> compat.linuxkpi.enable_rc6, compat.linuxkpi.semaphores, etc.
>>=20
>> And yeah, loader.conf is of course the right place.
>>=20
>> You can run 'sysctl -a | grep enable_rc6' =97 if you see drm.i915,
>> you're on the old module, if you see compat.linuxkpi, you're on the=20
>> new
>> one.
>>=20
>=20
>=20
> Out of curiosity, what do these knobs do?  Or for the semaphor knob,=20
> when would you use this?

rc6 is a lower power state. I think it should be enabled by default=20
anyway.

semaphores enables, well, semaphores, for some synchronization in the=20
driver somewhere=85 idk really :) also should probably be default=3D1
=




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