[mythtv-users] Locks Up and Slow Performance

Chris Pinkham cpinkham at bc2va.org
Thu Mar 20 19:58:02 UTC 2003

> Hrm... this almost sounds like my performance problems with MythTV right 
> now.. I haven't done any checking, but I do know that with my dual head 
> setup XFree disables DRI, so it could very well be disabling Xv as well. 
> Any ideas about what I could do about this, short of dumping dual-head? 
> Or am I pretty much screwed until an X update fixes this?
> Graeme

When you play a video or watch TV in mythfrontend, it will print out a
message saying either that it used Xv port X (X being some number) or
that it couldn't find Xv support and is falling back to non-Xv mode.  If
you see the Xv port message then Xv is in use, if you see the non-Xv
mode then that would explain some slowness.  The non-Xv mode uses a
lot of cpu horsepower to do the color conversion from YUV to RGB and also
to do the scaling.  When using Xv, those two are done in hardware on the
video card.


** Chris Pinkham                  Linux v2.2.18, Sane v1.0.4, Cajun v3.0-8 **
** cpinkham at bc2va.org                          http://www.bc2va.org/chris/ **

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