Date: Mon, 20 Feb 2017 05:45:45 -0600 From: Scott Bennett <bennett@sdf.org> To: avg@FreeBSD.org Cc: freebsd-x11@freebsd.org Subject: Re: vt(4) vs. sc(4) graphics card temperature/fan control Message-ID: <201702201145.v1KBjjPA003327@sdf.org> In-Reply-To: <201702201139.v1KBdtfC024379@sdf.org> References: <201702200949.v1K9nZWC029423@sdf.org> <b0c163cb-a15b-0e13-50fa-538db969a7d9@FreeBSD.org> <201702201139.v1KBdtfC024379@sdf.org>
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Scott Bennett <bennett@sdf.org> wrote:
> Andriy Gapon <avg@FreeBSD.org> wrote:
>
> > On 20/02/2017 11:49, Scott Bennett wrote:
> > > I haven't seen anything on this list for quite a while about this, but
> > > has there been any progress made on finding out why Xorg's temperature/fan
> > > speed control doesn't work if vt(4) is in use but does still work properly
> > > with sc(4)? I'm still tied to sc(4) in order to keep the noise down on a
> > > pair of Radeon HD 3270x2 cards, but it is really a drag not being able to
> ^
> |---- should have been an "8" as in "3870x2"
>
> > > get back to the console if Xorg is exited or crashes.
> >
> > Just curious, what do you use for fan speed control when it works?
> >
> I don't "use" anything. Once X starts up, the noise dies down. When
> a GPU has a bunch of work to do, the fans surge for two or three seconds,
> then slow down again. That's with sc(4).
> With vt(4), the fans continue to run full blast from the reboot on.
> Starting X has no effect on the fans. Load on a GPU has no effect on the
> fans; they continue to run full bore.
> I don't have any way to see the actual GPU temperatures or the current
> drawn in different situations. The only inputs I have regarding this are the
> noise levels. As far as I can tell, only the graphics card fans are affected
> and probably only on the card that is connected to a monitor. Although the
I worded that last kind of poorly. I meant that changes in load probably
only affect the fan speed on the card that has a monitor attached. All other
behavior is, AFAIK, the same on both cards.
> two cards are connected together by a Crossfire cable, X.org does not support
> coordinated GPU activites, so really only one of the four GPUs ever does
> anything once the r600 driver has been loaded into them.
>
>
> Scott Bennett, Comm. ASMELG, CFIAG
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