[Intel-gfx] Recommended driver version for Intel 915 GM

[Paul Menzel]

Am Donnerstag, den 07.01.2010, 09:24 +0800 schrieb Jin, Gordon:
> Paul Menzel wrote on Thursday, January 07, 2010 7:57 AM:
> > on the page for the Intel 2009Q4 graphics package [1] it is written in
> > the *Beyond TODO list* that >XvMC is disabled on 915G/GM for KMS:
> > bug#23012 [2].< [1].
> > 
> > And in bug #23012 [2] the following is stated by haihao >won't support
> > xvmc on 915 under KMS< [3].
> > 
> > I own an ASUS Eee PC 701 4G which is driven by an Intel 915GM chipset.
> > What driver version do I need to use to get the best possible, i. e.
> > can use Intel 915GM hardware acceleration best, result for playing
> > back video files.
> 
> We recommend the latest release, as usual.
> 
> We don't see playing video with xvmc gets advantage compared with xv
> on 915, so we decided not to take additional effort to implement it
> for KMS.

I see. Thank you for the information. Maybe the manual page should be
updated under which hardware prerequisites XvMC can be used.

> Do you really see benifit of xvmc? If you insist to use xvmc, you can
> try 2009Q3 release with KMS disabled.

I just tried to make a small comparison between XV and XvMC.

Playing back a file with XV with KMS enabled using MPlayer `top` showed
the following.

program	%CPU
Xorg	5.6
mplayer	5

I was unsuccessful testing XvMC though. I booted with
`video=i915:modeset=0`, put `option XvMC "true"` in the device section
of `/etc/X11/xorg.conf`, got the confirmation in `/var/log/Xorg.0.log`

        […]
        (II) Loading extension XVideo-MotionCompensation
        […]
        (**) intel(0): Intel XvMC decoder enabled
        […]

but MPlayer complained.

        […]
        vo_xvmc: X-Video extension 2.2
        vo_xvmc: No X-Video MotionCompensation Extension on :0.0
        Error opening/initializing the selected video_out (-vo) device.
        […]

That is similar to [4] and I tried all things suggested there.

I used the driver version 2.9.1. I will now upgrade to 2.10.0 anyways
and will not be able to test anymore.

Please find my Xorg.0.log attached.


Thanks,

Paul


> > [1] http://intellinuxgraphics.org/2009Q4.html
> > [2] https://bugs.freedesktop.org/show_bug.cgi?id=23012
> > [3] https://bugs.freedesktop.org/show_bug.cgi?id=23012#c2
[4] http://lists.freedesktop.org/archives/xorg/2008-June/036352.html
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