intel driver not powerfull enough for 1080p video?
Krzysztof Halasa
khc at pm.waw.pl
Tue Sep 25 12:56:36 PDT 2007
Hi,
"Alwin Bakkenes" <alwin at bakkenes.nu> writes:
> I simply don't get the performance I need and cannot find errors in my
> XOrg.0.log. When playing a simple mpeg2 based video through DVB-T my image
> is bad, lagging in some areas especially with panning pictures, but my CPU
> (an Intel 6850) is at 10% .
Perhaps you are using 3D overlay and there is no sync to vertical
refresh? You may want to check with xvinfo, something like:
$ xvinfo
X-Video Extension version 2.2
screen #0
Adaptor #0: "Intel(R) Textured Video"
number of ports: 16
port base: 57
operations supported: PutImage
...
Adaptor #1: "Intel(R) Video Overlay"
number of ports: 1
port base: 73
Not sure what G33 is and if it contains 2D overlay, but it may be
better.
> Some metrics: using glxgears I get 1776 FPS, is this any good for 3D?
glxgears is not a good benchmark, but yes, it means accelerated.
> As you can see in my Xorg.0.log, the 1080p video modes available are 50Hz
> and 24Hz. Both should be non-interlaced but at 50Hz, I see a lot of
> interlacing in mouse movements for example.
The driver doesn't support interlacing at all (not counting my private
hacks for RGB SDTV), so you just can't get interlaced output from
VGA/DVI/HDMI.
Perhaps your TV does something to it? Or the lack of sync between
3D overlay and vertical refresh.
--
Krzysztof Halasa
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