[mythtv-users] XvMC question
ojw at weilerfamily.com
ojw at weilerfamily.com
Sun Jul 27 04:56:29 UTC 2008
I'm having what seems to be an XvMC problem. Perhaps someone
here can give me a sanity check...
I'm running a P4 1.8Ghz (400Mhz FSB) with 640MB of RAM on a Dell
Dimension 4400. I'm using a nvidia 6200 AGP based card (specifically,
I'm recording only mpeg2 streams from an ATSC tuner. When I try
to playback 1080i based recordings, I'm averaging in the mid 70%
range on my cpu meter as reported by top and about every 5 seconds,
the video stutters. Based on what I've heard on this list, this
sounds like this card should be able to offload some of that cpu
and that maybe I don't have XvMC set up correctly.
I'm pretty sure I followed all the instructions at
Here are some of the things I have checked:
"dmesg | grep nvidia" produces this:
nvidia: module license 'NVIDIA' taints kernel.
NVRM: loading NVIDIA UNIX x86 Kernel Module 173.14.05 Mon May 19
00:06:12 PDT 2008
The kernel version is 126.96.36.199 compiled from sources from kernel.org.
"/sbin/lspci | grep -i nvidia" produces:
01:00.0 VGA compatible controller: nVidia Corporation NV44A [GeForce
6200] (rev a1)
"/sbin/lsmod | grep -i nvidia" produces:
nvidia 7091236 36
i2c_core 20756 12
The video card section of my xorg.conf looks like this:
Option "UseEvents" "true"
Option "XvmcUsesTextures" "false"
Option "NVAGP" "1"
When I do this "grep Motion /var/log/Xorg.0.log", I get this:
(II) Loading extension XVideo-MotionCompensation
Running "mythfrontend --version" produces this:
Please include all output in bug reports.
MythTV Version : exported
MythTV Branch : tags/release-0-21
Library API : 0.21.20080304-1
Network Protocol : 40
Options compiled in:
linux release using_oss using_alsa using_backend using_dbox2
using_dvb using_frontend using_hdhomerun using_iptv using_ivtv
using_joystick_menu using_v4l using_x11 using_xrandr using_xv
using_xvmc using_xvmcw using_xvmc_vld using_bindings_perl
using_bindings_python using_opengl using_ffmpeg_threads using_live
I created a playback profile that only uses xvmc. The
"playback" setting screen (3 of 9) has only one line that
looks like this:
if rez > 0 0 -> XvMC
So I'm kinda at a loss. I'm a newbie to MythTV so feel
free to point out the obvious. I'm a competent linux admin
so if I need to run some more diagnostics from the command
line, I'd be happy and able to do that.
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