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Date:      Wed, 15 Apr 2020 11:09:44 +0200
From:      Tomasz CEDRO <tomek@cedro.info>
To:        Theron <theron.tarigo@gmail.com>
Cc:        Niclas Zeising <zeising+freebsd@daemonic.se>, freebsd-x11@freebsd.org,  FreeBSD Questions Mailing List <freebsd-questions@freebsd.org>
Subject:   Re: drm-i915kms + x11-intel eats out all of the ram and swap but not with x11-scfb
Message-ID:  <CAFYkXjn7iwa7rmZVUYS75qKe6UeN8mBREG6h-n1zMt8UTS9whA@mail.gmail.com>
In-Reply-To: <24c43065-527d-499b-282a-43df2a947a1d@gmail.com>
References:  <CAFYkXj=HQ6NKx=_4fG5vyPokdL5FBpdiKccVChL-w7Q=Ty=w5w@mail.gmail.com> <19d0dbdc-f1ac-22f1-6934-076bb5733ab7@daemonic.se> <CAFYkXj=Tq4y_a_=ikiuspDbX6wK4qqPj5qturaZ3OS5CU4zQJw@mail.gmail.com> <24c43065-527d-499b-282a-43df2a947a1d@gmail.com>

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On Wed, Apr 15, 2020 at 2:41 AM Theron wrote:
> Shame to see xf86-video-intel being treated as if it's deprecated
> software meanwhile modesetting driver lags behind it on this basic level
> of image quality.

Wow, I also noticed a bit better picture quality with Intel driver,
but I was not sure if this is the driver thing, now it gets more
probable when also you mention it. To be honest I was a bit surprised
that it even worked :-) :-)

I guess this new modesetting driver will catch up quickly and get into
the point of better picture quality.. maybe there is some additional
setup that could improve things already?


> > I am sometimes using scfb when no drm is loaded just to have xorg working.
> Using scfb with i915kms loaded (yes it does work, no reason not to)
> actually gives substantial power savings for me (530 Skylake GT2 0x191b)
> compared to using xf86-video-intel: even with Xorg and a few
> non-animated graphical apps I can have power consumption on laptop
> almost as low as in console, but of course it is not good for video.
> Xorg+xf86-video-intel always wastes a few watts no matter what I try.

Exactly my observation, on Intel driver, except eating out the whole
system memory, basic applications like Enlightenment took around
20..40% CPU and Terminology took around 10..30% CPU on a decent
machine. On DRM i915KMS they take around 5% (E) and 1% (T) :-)

I guess there is no reason to use xf86-video-intel anymore for a reason :-P

Best regards :-)
Tomek

-- 
CeDeROM, SQ7MHZ, http://www.tomek.cedro.info



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