Date: Fri, 28 Apr 2000 17:31:16 -0700 From: Ulf Zimmermann <ulf@Alameda.net> To: Randall Hopper <aa8vb@ipass.net> Cc: Alexander Langer <alex@big.endian.de>, multimedia@FreeBSD.ORG Subject: Re: DGA on XF86 4.0 Message-ID: <20000428173116.F57534@PacHell.TelcoSucks.org> In-Reply-To: <20000427221616.A4841@ipass.net>; from aa8vb@ipass.net on Thu, Apr 27, 2000 at 10:16:16PM -0400 References: <20000427101213.A2872@cichlids.cichlids.com> <20000427221616.A4841@ipass.net>
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On Thu, Apr 27, 2000 at 10:16:16PM -0400, Randall Hopper wrote:
> Anyone got the scoop on DGA v2 versus v1 differences?
>
>
> Alexander Langer:
> |DGA doesn't work any more with fxtv since I've upgraded to XFree86
> |4.0.
> |
> |Are there any plans to update that in near future?
>
> Kenneth Culver also reported this. Apparently DGA v2 isn't backward
> compatible (I'm assuming your fxtv was rebuilt using XFree86 4.0
> libraries). He said:
>
> It seems that It's reporting that DGA isn't available:
> I get this:
> XF86DGAQueryDirectVideo() reports DGA not avail
>
> This rtn is returning False, which typically indicates failure.
>
> I've got my hands full with school right now, so I haven't even had a
> chance to install XFree86 4.0 yet. But if you or someone with 4.0 wants to
> help out, it might not take much time and I'm sure others would sure be
> appreciative.
>
> If you've done some development, man XF86DGA might disclose what's changed.
> If not (out-of-date docs), /usr/X11R6/include/X11/extensions/xf86dga*
> probably will.
>
> Either way, try this. Build fxtv from ports. Then in tvscreen.c, play
> with the XF86DGA... calls. For example, try replacing:
>
> ret = XF86DGAQueryVersion( s->display, &dga_majv, &dga_minv );
> with:
> ret = True;
> dga_flags_sup = XF86DGADirectPresent;
>
> and see what happens. "sync" your disks first. Direct Video is dangerous
> if given the wrong address. Erroneous (malicious or accidental)
> programming of the Bt8xx chip via the bktr driver is the single easiest way
> I know to trash your virtual memory space from userland.
By default DGA is not turned on in XFree86 4.0, I had to modify my
/etc/X11/XF86Config:
# This loads the miscellaneous extensions module, and disables
# initialisation of the XFree86-DGA extension within that module.
SubSection "extmod"
Option "xfree86-dga" # don't initialise the DGA extension
EndSubSection
That part is by default:
# This loads the miscellaneous extensions module, and disables
# initialisation of the XFree86-DGA extension within that module.
SubSection "extmod"
Option "omit xfree86-dga"
EndSubSection
>
> Randy
>
>
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--
Regards, Ulf.
---------------------------------------------------------------------
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