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Date:      Sat, 29 Mar 2014 10:02:17 -0700
From:      Justin Hibbits <chmeeedalf@gmail.com>
To:        Alexey Dokuchaev <danfe@FreeBSD.org>
Cc:        Chris Bigguy <bigguy_40@yahoo.com>, FreeBSD PowerPC ML <freebsd-ppc@freebsd.org>
Subject:   Re: PowerMac G4 graphics issue
Message-ID:  <20140329100217.505671e8@zhabar.att.net>
In-Reply-To: <20140329164046.GA7227@FreeBSD.org>
References:  <20081108120019.440D2106570D@hub.freebsd.org> <762295.44650.qm@web33105.mail.mud.yahoo.com> <20140329105152.GA73812@FreeBSD.org> <20140329124227.GA22005@FreeBSD.org> <CAHSQbTAy89HtJHfq1CmDGyygNwOVSh_19NnESgjvX1WhpdMDDQ@mail.gmail.com> <20140329164046.GA7227@FreeBSD.org>

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On Sat, 29 Mar 2014 16:40:46 +0000
Alexey Dokuchaev <danfe@FreeBSD.org> wrote:

> On Sat, Mar 29, 2014 at 09:10:59AM -0700, Justin Hibbits wrote:
> > On Mar 29, 2014 5:42 AM, "Alexey Dokuchaev" <danfe@freebsd.org>
> > wrote:
> > > Looks like `relax_mmap' is defined in powerpc/ofw/ofw_syscons.c,
> > > but I've removed "device sc" from kernel config in favor of
> > > "device vt".  Does it mean that X11 + ATI card + Newcons is not
> > > supported yet?  Can it be easily fixed, or I have to go back to
> > > syscons(4) for now?
> > 
> > Correct. Newcons+ofwfb+ATI in X11 doesn't work. You can try
> > xf86-video-scfb in ports to get X working with newcons for you, but
> > you lose any hardware acceleration that the ATI driver gives.
> 
> It's OK, as long as I can have hardware acceleration I can stay with
> syscons for a while.  I've backed out vt(4) support from kernel
> config and rebuilt; startx(1) now gets me to graphics mode with
> xterm(1) and window manager just fine (FWIW, hw.ofwfb.relax_mmap is 1
> by default now; I'm too lazy to dig out which particular commit made
> it so, but thanks for that).
> 
> HW accel seems to work: X11 overall feels quite fast; glxinfo reports:
> 
>   direct rendering: Yes
>   server glx vendor string: SGI
>   server glx version string: 1.4
>   ... [but]
>   OpenGL vendor string: Mesa Project
>   OpenGL renderer string: Software Rasterizer
>   OpenGL version string: 2.1 Mesa 9.1.7
>   OpenGL shading language version string: 1.20
> 
> glxgears spin at ~53 FPS.  I haven't benchmarked Quake yet. ;-)

Awesome!  I've never had success with DRI on PowerPC.

> However, screen resolution is 1024x768 for some reason; xrandr(1)
> yields:
> 
> Screen 0: minimum 320 x 200, current 1024 x 768, maximum 1024 x 1024
> DVI-1 disconnected 1024x768+0+0 (normal left inverted right x axis y
> axis) 0mm x 0mm DVI-0 disconnected (normal left inverted right x axis
> y axis) S-video disconnected (normal left inverted right x axis y
> axis) 1024x768 (0x55)   65.0MHz
>         h: width  1024 start 1048 end 1184 total 1344 skew    0 clock
> 48.4KHz v: height  768 start  771 end  777 total  806           clock
> 60.0Hz
> 
> That's not native resolution of my LCD monitor; any ideas how to get
> one? Why X reports "maximum 1024 x 1024"; nothing like that is set in
> xorg.conf.
> 
> ./danfe

I think X is just setting it to a square that's big enough to hold the
current screen.  That's not always the case, though, as on my G5 I see:

Screen 0: minimum 640 x 400, current 1920 x 1080, maximum 1920 x 1080


Hope that helps.

- Justin



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