[mythtv-users] XvMC WriteAudio: buffer underrun -- partial solution
Justin The Cynical
cynical at penguinness.org
Sat Sep 30 19:41:21 UTC 2006
Chris Skalenda wrote:
>> While I'm not sure if I had these problems in 0.19, I've been able to
>> get almost perfect XvMC playback by changing the NVAGP setting to "2"
>> in my xorg.conf:
> Setting NVAGP to 2 in my xorg.conf cleared up the prebuffering pause
> issues my mythtv system (Athlon XP 3000+, GeForce 6200, etc. Quite
> capable of playing HD) was having with 1080i playback with 0.20.
> CPU usage dropped from 90-100% (with or without Bob on) to 30-40%. It
> doesn't even stutter when the OSD comes up.
Interesting. Per the nvidia readme:
Option "NvAgp" "2" ... use AGPGART, if possible
Please note that NVIDIA's internal AGP support cannot work if AGPGART is
either statically compiled into your kernel or is built as a module and
loaded into your kernel. Please see Appendix F for details. Default: 3.
So, it sounds almost like the system was not loading the AGP stuff..
Looking at lsmod on my system, I'm seeing that agpgart and sis_agp is
loaded. Xorg.conf currently has NVAGP commented out, so it should be
loading the linux AGPGART.
According to /proc/driver/nvidia/agp/status:
AGP Rate: 4x
Fast Writes: Disabled
My video card is a MSI 6200 AGP fanless. Those of you who have this
card, what does the AGP status show for your card?
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