[mythtv-users] Slow/choppy playback problem (not the usual ones, either!)

Yan-Fa Li yanfali at best.com
Sat Oct 16 01:08:07 UTC 2004

Hmmm, sorry to hear that :(  Can you figure out if your CPU supports SSE 
and/or MMX ?  cat /proc/cpuinfo will print the appropriate flags.  It's 
a celeron so it should.

Then you could try recompiling mythtv with:

	CXXFLAGS="-Os -march=pentium4 -mmmx -msse"

and see wether that helps, you would add that to the settings.pro  Also 
try enabling ALSA by uncommenting it.  Then you can try setting mythtv 
sound output to "ALSA:default" just for comparison.

Also, is the box capable of using IO-APIC on UP ?  That will distribute 
IRQs, maybe something is sharing IRQs that doesn't like sharing.  That 
would require a kernel rebuild.


Joshua M. Thompson wrote:

> Ok as expected switching to AGP did not help. Now the X CPU usage
> between mplayer and mythtv is now even greater; "mplayer /dev/video0"
> eats up 6.6% CPU (down from 30%) and "mythtv" eats 60% (down from 70%).

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