[mythtv-users] no working video renderer available (xvmc-blit)

[mm44mm44 at gmx.net]

Hello list,

I am almost desperate with my MythTV.

I have installed Knoppmyth 5.5 on a Via Epia Me6000 Mainboard and I need to 
use the onboard chipset CLE266 for video acceleration.

I also did lots of upgrade using apt-get upgrade.

I have also installed xserver packages of openchrome. In my xorg.conf I start 
the driver in section "Device" with "openchrome"

This all works as I have a perfect working DVD-playback with 
:~>xine -V xxmc dvd://

Unfortunately my Mythfrontend obviously does not use the hw acceleration 
although I have tried different selection in the tv output configuration.

I have tried XvMC as well as Via-XvMC.

As video renderer there is xvmc-blit available but when I start whatching 
TV/recording I receive messages like

Quote:
> VideoOutputXv: Desired video renderer 'xvmc-blit' not available.
> codec 'None' makes 'xv-blit,xshm,xlib,' available, using 'xv-blit' instead.


But the fall back renderer obviously does not support hw acceleration. (High 
CPU load, choppy video)

I did some research in the internet and I found that this might be an issue of 
the new in Mythtv version 0.21 (which I have installed)

http://svn.mythtv.org/trac/ticket/4792

      ~$ mythfrontend --version
      Please include all output in bug reports.
      MythTV Version : 17686M
      MythTV Branch : branches/release-0-21-fixes
      Library API : 0.21.20080304-1
      Network Protocol : 40
      Options compiled in:
      linux release using_oss using_alsa using_arts using_jack using_backend 
using_dbox2 using_directfb using_dvb using_firewire using_frontend 
using_hdhomerun using_iptv using_ivtv using_joystick_menu using_libfftw3 
using_lirc using_opengl_vsync using_opengl_video 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_libavc_5_3 using_liv

My (urgent) questions:

- which renderer is the right one to pass video out through CLE266? When I 
tried any other renderer offered in the Mythtv settings, I received a very 
choppy video Sad

- how can I fall back to Mythtv 0.20 instead (using apt or a deb-package)?
- Do I need to recompile 0.21? But how ?

Thanks for help 

Raimund

PS:
I have already posted this to two forums (mysettopbox.tv 
and .mythtvtalk.com/forum) but there are only few views and no replies so far 
to this tricky issue ...